fixing compilo

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55543 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/string.h

@@ -672,7 +672,7 @@ private:
       // simple loop instead of starting from the last used element (there are
       // a lot of misses in this function...)
       Cache::Element * const cacheBegin = GetCacheBegin();
- #if !wxHAS_COMPILER_TLS
+#ifndef wxHAS_COMPILER_TLS
       // during destruction tls calls may return NULL, in this case return NULL 
       // immediately without accessing anything else
       if ( cacheBegin == NULL )