compiles with png

Former-commit-id: d364883b8a7fbba8bea6d4e9a3877c8aa7397c15

examples/textured-mesh/Makefile

@@ -23,7 +23,7 @@ EMBREE_LIB=-L$(EMBREE)/build -lembree -lsys
 
 # YIMAGE Library
 YIMG=$(LIBIGL)/external/yimg/
-YIMG_LIB=-L$(YIMG) -lyimg -lz -L/usr/X11/lib -lpng -bind_at_load
+YIMG_LIB=-L$(YIMG) -lyimg -lz -L/opt/local/lib -lpng -bind_at_load
 YIMG_INC=-I/usr/X11/include -I$(YIMG) 
 
 ANTTWEAKBAR_INC=-I$(LIBIGL)/external/AntTweakBar/include