Fix bad error pointer returned by Font_LoseFont

Detail:
  s/Fonts01 - Change a TEQ to a CMP to ensure the V flag is cleared; if a font handle like &80000000 was supplied then the opening CMP would set the V flag, accidentally causing the code to return a garbage error pointer.
  s/Errors - Apparently AddError requires '$' to be doubly-escaped to '$$$$' to stop objasm from throwing a warning.
Admin:
  Tested on wandboard
  Fixes AODT on SYS "Font_LoseFont",&80000000


Version 3.79. Tagged as 'Manager-3_79'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "3.78"
-Module_Version          SETA    378
+Module_MajorVersion     SETS    "3.79"
+Module_Version          SETA    379
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "28 Feb 2017"
-Module_ApplicationDate  SETS    "28-Feb-17"
+Module_Date             SETS    "04 Feb 2018"
+Module_ApplicationDate  SETS    "04-Feb-18"
 Module_ComponentName    SETS    "Manager"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Video/Render/Fonts/Manager"
-Module_FullVersion      SETS    "3.78"
-Module_HelpVersion      SETS    "3.78 (28 Feb 2017)"
+Module_FullVersion      SETS    "3.79"
+Module_HelpVersion      SETS    "3.79 (04 Feb 2018)"
                         END

VersionNum

-/* (3.78)
+/* (3.79)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        3.78
+#define Module_MajorVersion_CMHG        3.79
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                28 Feb 2017
+#define Module_Date_CMHG                04 Feb 2018
 
-#define Module_MajorVersion             "3.78"
-#define Module_Version                  378
+#define Module_MajorVersion             "3.79"
+#define Module_Version                  379
 #define Module_MinorVersion             ""
-#define Module_Date                     "28 Feb 2017"
+#define Module_Date                     "04 Feb 2018"
 
-#define Module_ApplicationDate          "28-Feb-17"
+#define Module_ApplicationDate          "04-Feb-18"
 
 #define Module_ComponentName            "Manager"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Video/Render/Fonts/Manager"
 
-#define Module_FullVersion              "3.78"
-#define Module_HelpVersion              "3.78 (28 Feb 2017)"
-#define Module_LibraryVersionInfo       "3:78"
+#define Module_FullVersion              "3.79"
+#define Module_HelpVersion              "3.79 (04 Feb 2018)"
+#define Module_LibraryVersionInfo       "3:79"

s/Errors

@@ -42,7 +42,7 @@
  AddError FontBadCtrlChar,       "ErrBadCtrlChar:Illegal control character in font string"
  AddError FontsInUse,            "ErrsInUse:Font manager in use"
  AddError FontBadSegment,        "ErrBadSegment:Illegal line segment in outline font"
- AddError FontBadPrefix,         "ErrBadPrefix:%1 (while scanning Font$$Path)"
+ AddError FontBadPrefix,         "ErrBadPrefix:%1 (while scanning Font$$$$Path)"
  AddError FontReserved,          "ErrReserved:Reserved fields must be zero"
  AddError FontBadCharCode,       "ErrBadCharCode:Character code out of range"
  AddError FontNoBitmaps,         "ErrNoBitmaps:ROM font directory cannot contain bitmaps"

s/Fonts01

@@ -4180,7 +4180,7 @@ SWIFont_CacheAddr ROUT
 SWIFont_LoseFont Entry "R1-R3,R6"
 
         CMP     R0,#maxf
-        TEQCS   R0,R0                   ; don't bother with handles > 255
+        CMPCS   R0,R0                   ; don't bother with handles > 255
         TEQNE   R0,#0                   ; don't bother with handle 0 either
         LDRNE   R2,cacheindex
         TEQNE   R2,#0