(skills) don't try to save image when error (#1240)

Author: MatthijsBurgh

robot_skills/src/robot_skills/world_model_ed.py

@@ -416,6 +416,7 @@ def save_image(self, path="", path_suffix="", filename=""):
         res = self._ed_get_image_srv(filename=filename)
         if res.error_msg:
             rospy.logerr("Could not save image: %s" % res.error_msg)
+            return False
 
         with open(fname + ".rgbd", "wb") as f:
             f.write(bytearray(res.rgbd_data))
@@ -426,6 +427,8 @@ def save_image(self, path="", path_suffix="", filename=""):
         # rgbd to png
         os.system('rosrun rgbd rgbd_to_png %s' % (fname + ".rgbd"))  # ToDo: very very very ugly
 
+        return True
+
     # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
     @deprecated