jscript: Fixed handling block_cnt in jsheap_alloc.

dlls/jscript/jsutils.c

@@ -83,25 +83,25 @@ void *jsheap_alloc(jsheap_t *heap, DWORD size)
         heap->block_cnt = 1;
     }
 
-    if(heap->offset + size < block_size(heap->last_block)) {
+    if(heap->offset + size <= block_size(heap->last_block)) {
         tmp = ((BYTE*)heap->blocks[heap->last_block])+heap->offset;
         heap->offset += size;
         return tmp;
     }
 
-    if(size < block_size(heap->last_block+1)) {
+    if(size <= block_size(heap->last_block+1)) {
         if(heap->last_block+1 == heap->block_cnt) {
             tmp = heap_realloc(heap->blocks, (heap->block_cnt+1)*sizeof(void*));
             if(!tmp)
                 return NULL;
-            heap->blocks = tmp;
-        }
 
-        tmp = heap_alloc(block_size(heap->block_cnt+1));
-        if(!tmp)
-            return NULL;
+            heap->blocks = tmp;
+            heap->blocks[heap->block_cnt] = heap_alloc(block_size(heap->block_cnt));
+            if(!heap->blocks[heap->block_cnt])
+                return NULL;
 
-        heap->blocks[heap->block_cnt++] = tmp;
+            heap->block_cnt++;
+        }
 
         heap->last_block++;
         heap->offset = size;