Bug#22828 complementary patch:

- 'false' not defined in C, use FALSE instead.


mysys/my_lock.c:
  Fixed error in windows built:
  'false' not defined in C, use FALSE instead.

mysys/my_lock.c

@@ -111,7 +111,7 @@ int my_lock(File fd, int locktype, my_off_t start, my_off_t length,
 #elif defined(HAVE_LOCKING)
   /* Windows */
   {
-    my_bool error= false;
+    my_bool error= FALSE;
     pthread_mutex_lock(&my_file_info[fd].mutex);
     if (MyFlags & MY_SEEK_NOT_DONE) 
     {