Adding missing implemention of xosheap_realloc

Detail:
  The header file declaration was there .. the implementation wasn't.
Admin:
  Required by AcornSSL.

Version 0.07. Tagged as 'AsmUtils-0_07'

VersionNum

-/* (0.06)
+/* (0.07)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  *
  */
-#define Module_MajorVersion_CMHG        0.06
+#define Module_MajorVersion_CMHG        0.07
 #define Module_MinorVersion_CMHG
-#define Module_Date_CMHG                15 Mar 2000
+#define Module_Date_CMHG                05 May 2000
 
-#define Module_MajorVersion             "0.06"
-#define Module_Version                  6
+#define Module_MajorVersion             "0.07"
+#define Module_Version                  7
 #define Module_MinorVersion             ""
-#define Module_Date                     "15 Mar 2000"
+#define Module_Date                     "05 May 2000"
 
-#define Module_FullVersion              "0.06"
+#define Module_FullVersion              "0.07"

s/heapswis

@@ -30,6 +30,7 @@
         EXPORT  xosheap_alloc
         EXPORT  xosheap_free
         EXPORT  xosheap_resize
+        EXPORT  xosheap_realloc
         EXPORT  xosheap_read_size
 
         AREA    |AsmUtils$MemSWIs1$$Code|,CODE,READONLY,PIC
@@ -87,4 +88,17 @@ xosheap_read_size
         MOVVC   R0,#0
         Return
 
+        AREA    |AsmUtils$MemSWIs6$$Code|,CODE,READONLY,PIC
+xosheap_realloc
+        FunctionEntry
+        MOV     R12,R3
+        MOV     R3,R2
+        MOV     R2,R1
+        MOV     R1,R0
+        MOV     R0,#HeapReason_ExtendBlock
+        SWI     XOS_Heap
+        MOVVC   R0,#0
+        STRVC   R2,[R12]
+        Return
+
         END