Add alias of SP

When building with BASIC that doesn't recognise SP as register 13, make sure it's defined locally just incase.
Spotted by Willi Theiss on an A9Home.

Version 1.67. Tagged as 'Library-1_67'

VersionNum

-/* (1.66)
+/* (1.67)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        1.66
+#define Module_MajorVersion_CMHG        1.67
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                08 Feb 2014
+#define Module_Date_CMHG                18 Feb 2014
 
-#define Module_MajorVersion             "1.66"
-#define Module_Version                  166
+#define Module_MajorVersion             "1.67"
+#define Module_Version                  167
 #define Module_MinorVersion             ""
-#define Module_Date                     "08 Feb 2014"
+#define Module_Date                     "18 Feb 2014"
 
-#define Module_ApplicationDate          "08-Feb-14"
+#define Module_ApplicationDate          "18-Feb-14"
 
 #define Module_ComponentName            "Library"
 #define Module_ComponentPath            "mixed/RiscOS/Library"
 
-#define Module_FullVersion              "1.66"
-#define Module_HelpVersion              "1.66 (08 Feb 2014)"
-#define Module_LibraryVersionInfo       "1:66"
+#define Module_FullVersion              "1.67"
+#define Module_HelpVersion              "1.67 (18 Feb 2014)"
+#define Module_LibraryVersionInfo       "1:67"