exclude heap usage for windows compile under __MINGW__

src/frontend/outitf.c

@@ -68,7 +68,7 @@ static void freeRun(runDesc *run);
    to prevent massive memory fragmentation of standard process heap.
    This is especially required by TCL for Windows, but may help
    also under standard Windows GUI. */
-#if (defined(HAS_TCLWIN)) && (defined(_MSC_VER) || defined(__MINGW32__))
+#if (defined(HAS_TCLWIN)) && ((defined(_MSC_VER) || defined(__MINGW32__)))
 #define newrealloc hrealloc
 #else
 #define newrealloc trealloc

src/misc/alloc.c

@@ -143,7 +143,6 @@ trealloc(void *ptr, size_t num)
    Function is used in outitf.c to prevent heap fragmentation 
    An additional heap outheap is used to store the plot output data.
 */
-//#if defined(HAS_WINDOWS) || defined(HAS_TCLWIN)
 #if defined(HAS_TCLWIN)
 #if defined(_MSC_VER) || defined(__MINGW32__)
 void *