Fix a few nasty Wimp bugs

Detail:
  s/Wimp05 (setcaretcoords_fancy), s/Wimp07 - Fix some dodgy comments that had trailing backslashes, causing the next line of code to be gobbled by objasm and omitted from the compiled code. The code in question has been around for a long time, so I guess a recent objasm change (or the switch from aasm) has caused the dodgy comments to turn malicious. The setcaretcoords_fancy bug was the cause of bug #241 in the ROOL tracker.
  s/Wimp05 (int_set_caret_position) - While testing the #241 fix, I found that opening the filer 'rename' menu, typing text (enough to cause the icon to scroll), and then clicking away to close the menu would cause an infinite abort loop. The cause seemed to be int_set_caret_position mistakenly setting the caret window ptr to 0 instead of nullptr (-1), which would then cause setwindowptrs to die when it tried dereferencing what it thought was a valid pointer. Although initially confused about how this bug has gone unnoticed so far, I've now realised the abort was just down to alignment exceptions being turned on and the code would have "worked" on <=ARMv5.
Admin:
  Tested on rev C2 beagleboard.
  Fixes bug #241.


Version 5.08. Tagged as 'Wimp-5_08'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "5.07"
-Module_Version          SETA    507
+Module_MajorVersion     SETS    "5.08"
+Module_Version          SETA    508
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "06 Nov 2009"
-Module_ApplicationDate  SETS    "06-Nov-09"
+Module_Date             SETS    "14 Mar 2010"
+Module_ApplicationDate  SETS    "14-Mar-10"
 Module_ComponentName    SETS    "Wimp"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Desktop/Wimp"
-Module_FullVersion      SETS    "5.07"
-Module_HelpVersion      SETS    "5.07 (06 Nov 2009)"
+Module_FullVersion      SETS    "5.08"
+Module_HelpVersion      SETS    "5.08 (14 Mar 2010)"
                         END

VersionNum

-/* (5.07)
+/* (5.08)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        5.07
+#define Module_MajorVersion_CMHG        5.08
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                06 Nov 2009
+#define Module_Date_CMHG                14 Mar 2010
 
-#define Module_MajorVersion             "5.07"
-#define Module_Version                  507
+#define Module_MajorVersion             "5.08"
+#define Module_Version                  508
 #define Module_MinorVersion             ""
-#define Module_Date                     "06 Nov 2009"
+#define Module_Date                     "14 Mar 2010"
 
-#define Module_ApplicationDate          "06-Nov-09"
+#define Module_ApplicationDate          "14-Mar-10"
 
 #define Module_ComponentName            "Wimp"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Desktop/Wimp"
 
-#define Module_FullVersion              "5.07"
-#define Module_HelpVersion              "5.07 (06 Nov 2009)"
-#define Module_LibraryVersionInfo       "5:7"
+#define Module_FullVersion              "5.08"
+#define Module_HelpVersion              "5.08 (14 Mar 2010)"
+#define Module_LibraryVersionInfo       "5:8"

s/Wimp05

@@ -119,6 +119,7 @@ int_set_caret_position TraceL sc
 
         MOV     R14,#0
         STR     R14,caretdata+24        ; 'old caretscrollx' = 0 for sure now
+        MOV     R14,#nullptr
         STR     R14,caretdata+0         ; CARET IS DEFINITELY NOT NOW HERE
         BL      pageinicontask          ; Swap to task if icon indirected
 
@@ -1157,7 +1158,7 @@ setcaretcoords_fancy TraceL sc
         TEQ     R2, #ISOAlphabet_UTF8
         MOVNE   R4, #1                  ; \ non UTF-8 read
         LDRNEB  R6, [R1, R5]            ; /
-        MOVEQ   R4, #6                  ; \
+        MOVEQ   R4, #6                  ; \.
         ADDEQ   R6, R1, R5              ;  > UTF-8 read
         BLEQ    convert_UTF8_to_UCS4    ; /
         CMP     R6, #26                 ; font change command?

s/Wimp07

@@ -2765,7 +2765,7 @@ clearstack
         MOV     R1, #-1
         STR     R1, linecount                   ; activate line counting
         LDR     R2, [sp, #1*4]                  ; R2 -> text icon definition
-        LDMIA   R2, {x0, y0, x1, y1}            ;\
+        LDMIA   R2, {x0, y0, x1, y1}            ;\.
         LDR     R1, [R2, #i_flags]              ; |
         LDR     R2, [R2, #i_data + 0]           ; | set up registers for line count
       [ outlinefont                             ; |