Z_Zone: fixup Valgrind support

src/z_zone.c

@@ -232,12 +232,12 @@ void Z_Free(void *ptr)
 
 	// Free the memory and get rid of the block.
 	free(block->real);
-	block->prev->next = block->next;
-	block->next->prev = block->prev;
-	free(block);
 #ifdef VALGRIND_DESTROY_MEMPOOL
 	VALGRIND_DESTROY_MEMPOOL(block);
 #endif
+	block->prev->next = block->next;
+	block->next->prev = block->prev;
+	free(block);
 }
 
 /** malloc() that doesn't accept failure.
@@ -317,13 +317,9 @@ void *Z_MallocAlign(size_t size, INT32 tag, void *user, INT32 alignbits)
 	// The mem header lives 'sizeof (memhdr_t)' bytes before given.
 	hdr = (memhdr_t *)((UINT8 *)given - sizeof *hdr);
 
-#ifdef VALGRIND_CREATE_MEMPOOL
-	VALGRIND_CREATE_MEMPOOL(block, padsize, Z_calloc);
+#ifdef HAVE_VALGRIND
 	Z_calloc = false;
 #endif
-#ifdef VALGRIND_MEMPOOL_ALLOC
-	VALGRIND_MEMPOOL_ALLOC(block, hdr, size + sizeof *hdr);
-#endif
 
 	block->next = head.next;
 	block->prev = &head;
@@ -341,6 +337,13 @@ void *Z_MallocAlign(size_t size, INT32 tag, void *user, INT32 alignbits)
 	block->size = blocksize;
 	block->realsize = size;
 
+#ifdef VALGRIND_CREATE_MEMPOOL
+	VALGRIND_CREATE_MEMPOOL(block, padsize, Z_calloc);
+#endif
+//#ifdef VALGRIND_MEMPOOL_ALLOC
+//	VALGRIND_MEMPOOL_ALLOC(block, hdr, size + sizeof *hdr);
+//#endif
+
 	hdr->id = ZONEID;
 	hdr->block = block;