Fix blatantly wrong SetFilePointer() calls.

dlls/msvcrt/file.c

@@ -605,7 +605,7 @@ int _locking(int fd, int mode, LONG nbytes)
         (mode==_LK_NBRLCK)?"_LK_NBRLCK":
                           "UNKNOWN");
 
-  if ((cur_locn = SetFilePointer(hand, 0L, NULL, SEEK_CUR)) == 0xffffffff)
+  if ((cur_locn = SetFilePointer(hand, 0L, NULL, SEEK_CUR)) == INVALID_SET_FILE_POINTER)
   {
     FIXME ("Seek failed\n");
     *MSVCRT__errno() = MSVCRT_EINVAL; /* FIXME */

dlls/ole32/storage.c

@@ -110,7 +110,8 @@ STORAGE_get_big_block(HANDLE hf,int n,BYTE *block)
     DWORD result;
 
     assert(n>=-1);
-    if (!SetFilePointer( hf, (n+1)*BIGSIZE, NULL, SEEK_SET ))
+    if ((SetFilePointer( hf, (n+1)*BIGSIZE, NULL,
+                         SEEK_SET ) == INVALID_SET_FILE_POINTER) && GetLastError())
     {
         WARN(" seek failed (%ld)\n",GetLastError());
         return FALSE;
@@ -132,9 +133,10 @@ STORAGE_put_big_block(HANDLE hf,int n,BYTE *block)
     DWORD result;
 
     assert(n>=-1);
-    if (!SetFilePointer( hf, (n+1)*BIGSIZE, NULL, SEEK_SET ))
+    if ((SetFilePointer( hf, (n+1)*BIGSIZE, NULL,
+                         SEEK_SET ) == INVALID_SET_FILE_POINTER) && GetLastError())
     {
-        WARN(" seek failed (%ld)\n",GetLastError());
+        WARN("seek failed (%ld)\n",GetLastError());
         return FALSE;
     }
     if (!WriteFile( hf, block, BIGSIZE, &result, NULL ) || result != BIGSIZE)