Tools/Vmapextractor: Fixed extracting liquids in wmos

src/tools/vmap4_extractor/wmo.cpp

@@ -169,8 +169,6 @@ bool WMOGroup::open()
         }
         fourcc[4] = 0;
         size_t nextpos = f.getPos() + size;
-        LiquEx_size = 0;
-        liquflags = 0;
 
         if (!strcmp(fourcc,"MOGP"))//header
         {