In w32heap.c bump up DUMPED_HEAP_SIZE

* src/w32heap.c (DUMPED_HEAP_SIZE): Bump up DUMPED_HEAP_SIZE
to 13*1024*1024 for 32-bit non-wide-integer builds.

src/w32heap.c

@@ -118,7 +118,7 @@ typedef struct _RTL_HEAP_PARAMETERS {
 #if defined _WIN64 || defined WIDE_EMACS_INT
 # define DUMPED_HEAP_SIZE (21*1024*1024)
 #else
-# define DUMPED_HEAP_SIZE (12*1024*1024)
+# define DUMPED_HEAP_SIZE (13*1024*1024)
 #endif
 
 static unsigned char dumped_data[DUMPED_HEAP_SIZE];