fix mem leak

gistfile1.txt

@@ -2272,21 +2272,33 @@ void ServerMap::finishBlockMake(BlockMakeData *data,
 	bool enable_mapgen_debug_info = m_emerge->mapgen_debug_info;
 
 	/*infostream<<"Resulting vmanip:"<<std::endl;
 	data->vmanip.print(infostream);*/
 
+	MapBlock *prev_block = NULL;
 	// Make sure affected blocks are loaded
 	for(s16 x=blockpos_min.X-extra_borders.X;
 			x<=blockpos_max.X+extra_borders.X; x++)
 	for(s16 z=blockpos_min.Z-extra_borders.Z;
 			z<=blockpos_max.Z+extra_borders.Z; z++)
 	for(s16 y=blockpos_min.Y-extra_borders.Y;
 			y<=blockpos_max.Y+extra_borders.Y; y++)
 	{
 		v3s16 p(x, y, z);
 		// Load from disk if not already in memory
-		emergeBlock(p, false);
+		MapBlock *block = emergeBlock(p, false);
+		if (prev_block != block && data->transforming_liquid.size() > 0) {
+			/* Copy transforming liquid information
+			 */
+			while(data->transforming_liquid.size() > 0)
+			{
+				v3s16 p = data->transforming_liquid.pop_front();
+				m_transforming_liquid.push_back(p);
+			}
+			block->raiseModified(MOD_STATE_WRITE_NEEDED, "transforming liquids");
+			prev_block = block;
+		}
 	}
 
 	/*
 		Blit generated stuff to map
 		NOTE: blitBackAll adds nearly everything to changed_blocks
@@ -2298,19 +2310,10 @@ void ServerMap::finishBlockMake(BlockMakeData *data,
 	}
 
 	EMERGE_DBG_OUT("finishBlockMake: changed_blocks.size()=" << changed_blocks.size());
 
 	/*
-		Copy transforming liquid information
-	*/
-	while(data->transforming_liquid.size() > 0)
-	{
-		v3s16 p = data->transforming_liquid.pop_front();
-		m_transforming_liquid.push_back(p);
-	}
-
-	/*
 		Do stuff in central blocks
 	*/
 
 	/*
 		Update lighting