kernel32/tests: Don't wait for overlapped result if the previous test failed.

dlls/kernel32/tests/change.c

@@ -457,9 +457,12 @@ static void test_readdirectorychanges(void)
     ok( ov.Internal == STATUS_SUCCESS, "ov.Internal wrong\n");
     ok( ov.InternalHigh == 0x12, "ov.InternalHigh wrong\n");
 
+    if (ov.Internal == STATUS_SUCCESS)
+    {
         r = GetOverlappedResult( hdir, &ov, &dwCount, TRUE );
         ok( r == TRUE, "getoverlappedresult failed\n");
         ok( dwCount == 0x12, "count wrong\n");
+    }
 
     pfni = (PFILE_NOTIFY_INFORMATION) buffer;
     ok( pfni->NextEntryOffset == 0, "offset wrong\n" );