Fix null pointer dereference in findSUBDIR

Detail:
  c/DOSFSops - The while() loop in findSUBDIR now bails immediately if getnextDIRentry() returns NULL. Avoids null pointer dereference when calling buildFILEname().
Admin:
  Tested on Raspberry Pi with high processor vectors


Version 0.92. Tagged as 'DOSFS-0_92'

VersionNum

-/* (0.91)
+/* (0.92)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        0.91
+#define Module_MajorVersion_CMHG        0.92
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                14 Jul 2012
+#define Module_Date_CMHG                21 Jul 2012
 
-#define Module_MajorVersion             "0.91"
-#define Module_Version                  91
+#define Module_MajorVersion             "0.92"
+#define Module_Version                  92
 #define Module_MinorVersion             ""
-#define Module_Date                     "14 Jul 2012"
+#define Module_Date                     "21 Jul 2012"
 
-#define Module_ApplicationDate          "14-Jul-12"
+#define Module_ApplicationDate          "21-Jul-12"
 
 #define Module_ComponentName            "DOSFS"
 #define Module_ComponentPath            "castle/RiscOS/Sources/FileSys/ImageFS/DOSFS"
 
-#define Module_FullVersion              "0.91"
-#define Module_HelpVersion              "0.91 (14 Jul 2012)"
-#define Module_LibraryVersionInfo       "0:91"
+#define Module_FullVersion              "0.92"
+#define Module_HelpVersion              "0.92 (21 Jul 2012)"
+#define Module_LibraryVersionInfo       "0:92"

c/DOSFSops

@@ -1264,9 +1264,11 @@ static DOS_direntry *findSUBDIR(char *wcname,DIR_info *cdir,int dir_size,int *in
   {
    oldindex=*index;
    dentry = getnextDIRentry(dir,dir_size,index) ;
+   if(!dentry)
+    break;
    cfile = ((cdir->lfnp[oldindex])!=NULL)?(cdir->lfnp[oldindex]):buildFILEname(dentry,nbuff);
 //   cfile = buildFILEname(dentry,nbuff);
-  } while ((dentry != NULL) && (((dentry->FILE_attribute & FILE_subdir) == 0) || (namematch(wcname,cfile) != TRUE))) ;
+  } while ((((dentry->FILE_attribute & FILE_subdir) == 0) || (namematch(wcname,cfile) != TRUE))) ;
 
  if (dentry)
   strcpy(wcname, cfile);