Fix alignment fault when reporting the "This file doesn't contain a BASIC program" error

Detail:
  rlib/c/txtedit - Rather than generating a proper error block to send to Wimp_ReportError, txtedit__validbasicfile was just subtracting 4 from the pointer to the error string.
  The resulting address isn't guaranteed to be aligned properly, resulting in an alignment fault on ARMv7 when Wimp_ReportError examines the error number.
  The new code just reuses the 'buff' array to build a temporary error block.
Admin:
  Fixes alignment fault on beagleboard when attempting to load a detokenized BASIC file into !Edit.


Version 5.57. Tagged as 'RISC_OSLib-5_57'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "5.56"
-Module_Version          SETA    556
+Module_MajorVersion     SETS    "5.57"
+Module_Version          SETA    557
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "28 Nov 2009"
-Module_ApplicationDate  SETS    "28-Nov-09"
+Module_Date             SETS    "26 Nov 2010"
+Module_ApplicationDate  SETS    "26-Nov-10"
 Module_ComponentName    SETS    "RISC_OSLib"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Lib/RISC_OSLib"
-Module_FullVersion      SETS    "5.56"
-Module_HelpVersion      SETS    "5.56 (28 Nov 2009)"
+Module_FullVersion      SETS    "5.57"
+Module_HelpVersion      SETS    "5.57 (26 Nov 2010)"
                         END

VersionNum

-/* (5.56)
+/* (5.57)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        5.56
+#define Module_MajorVersion_CMHG        5.57
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                28 Nov 2009
+#define Module_Date_CMHG                26 Nov 2010
 
-#define Module_MajorVersion             "5.56"
-#define Module_Version                  556
+#define Module_MajorVersion             "5.57"
+#define Module_Version                  557
 #define Module_MinorVersion             ""
-#define Module_Date                     "28 Nov 2009"
+#define Module_Date                     "26 Nov 2010"
 
-#define Module_ApplicationDate          "28-Nov-09"
+#define Module_ApplicationDate          "26-Nov-10"
 
 #define Module_ComponentName            "RISC_OSLib"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Lib/RISC_OSLib"
 
-#define Module_FullVersion              "5.56"
-#define Module_HelpVersion              "5.56 (28 Nov 2009)"
-#define Module_LibraryVersionInfo       "5:56"
+#define Module_FullVersion              "5.57"
+#define Module_HelpVersion              "5.57 (26 Nov 2010)"
+#define Module_LibraryVersionInfo       "5:57"

rlib/c/txtedit

@@ -2275,8 +2275,11 @@ static BOOL txtedit__validbasicfile(char *filename)
       }
       os_swi2(OS_Find, 0, r1);                       /* close the file */
       if (!result) {
+        _kernel_oserror *e = (_kernel_oserror *) buff; /* Reuse buff since it's big enough */
+        e->errnum = 0;
+        strcpy(e->errmess,msgs_lookup(MSGS_bas1));
         r1 = _swi(Wimp_ReportError, _IN(0)|_IN(1)|_IN(2)|_RETURN(1),
-             msgs_lookup(MSGS_bas1) - 4, 3, wimpt_programname());
+             e, 3, wimpt_programname());
         if (r1 == 2) return 2;
       }
     }