Fixes background display in sprite file window

Detail:
  Change made to main_clear_background to cope with background sprites which
  are the wrong colour depth.
 
  The background sprite is no longer used if the 'Textured window
  backgrounds' CMOS bit is not set.
Admin:
  Tested on Iyonix RO v5.11
Changed by:
  Colin Granville.

Version 2.00. Tagged as 'Paint-2_00'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "1.99"
-Module_Version          SETA    199
+Module_MajorVersion     SETS    "2.00"
+Module_Version          SETA    200
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "18 Sep 2007"
-Module_ApplicationDate  SETS    "18-Sep-07"
+Module_Date             SETS    "13 Nov 2007"
+Module_ApplicationDate  SETS    "13-Nov-07"
 Module_ComponentName    SETS    "Paint"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Apps/Paint"
-Module_FullVersion      SETS    "1.99"
-Module_HelpVersion      SETS    "1.99 (18 Sep 2007)"
+Module_FullVersion      SETS    "2.00"
+Module_HelpVersion      SETS    "2.00 (13 Nov 2007)"
                         END

VersionNum

-/* (1.99)
+/* (2.00)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.2.
  *
  */
-#define Module_MajorVersion_CMHG        1.99
+#define Module_MajorVersion_CMHG        2.00
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                18 Sep 2007
+#define Module_Date_CMHG                13 Nov 2007
 
-#define Module_MajorVersion             "1.99"
-#define Module_Version                  199
+#define Module_MajorVersion             "2.00"
+#define Module_Version                  200
 #define Module_MinorVersion             ""
-#define Module_Date                     "18 Sep 2007"
+#define Module_Date                     "13 Nov 2007"
 
-#define Module_ApplicationDate          "18-Sep-07"
+#define Module_ApplicationDate          "13-Nov-07"
 
 #define Module_ComponentName            "Paint"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Apps/Paint"
 
-#define Module_FullVersion              "1.99"
-#define Module_HelpVersion              "1.99 (18 Sep 2007)"
-#define Module_LibraryVersionInfo       "1:99"
+#define Module_FullVersion              "2.00"
+#define Module_HelpVersion              "2.00 (13 Nov 2007)"
+#define Module_LibraryVersionInfo       "2:0"