rxfs_storePadd: return 0 on success

On success, storePadd should return 0, not the number of bytes
written by the last rx_Write call.  In some cases this return
value would leak all the way out to the close() system call,
causing it to fail.

Reviewed-on: http://gerrit.openafs.org/573
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>

src/afs/afs_fetchstore.c

@@ -213,7 +213,7 @@ rxfs_storePadd(void *rock, afs_uint32 size)
 	    return -33;	/* XXX */
 	size -= tlen;
     }
-    return code;
+    return 0;
 }
 
 afs_int32