Added check for address being freed by mempool free

When blender is built in debug mode, BLI_mempool_free will
ensure address passed to the function actually belongs to
this pool.

--
svn merge -r58710:58711 ^/branches/soc-2013-depsgraph_mt

source/blender/blenlib/intern/BLI_mempool.c

@@ -258,6 +258,22 @@ void BLI_mempool_free(BLI_mempool *pool, void *addr)
 {
 	BLI_freenode *newhead = addr;
 
+#ifndef NDEBUG
+	{
+		BLI_mempool_chunk *chunk;
+		bool found = false;
+		for (chunk = pool->chunks.first; chunk; chunk = chunk->next) {
+			if ((char*)addr >= (char*)chunk->data && (char*)addr < (char*)chunk->data + pool->csize) {
+				found = true;
+				break;
+			}
+		}
+		if (!found) {
+			BLI_assert(!"Attempt to free data which is not in pool.\n");
+		}
+	}
+#endif
+
 	if (pool->flag & BLI_MEMPOOL_ALLOW_ITER) {
 #ifndef NDEBUG
 		/* this will detect double free's */