MeasureIt: Enable error catch to avoid hidden errors in big try except block

In some situations an unexpected error could appear in OpenGL. This try
block catch
this error and finish smoothly the routine and print a error message in
the console to avoid the error keeps hidden, specially if some API
change.

measureit/measureit_geometry.py

@@ -635,8 +635,7 @@ def draw_segments(context, myobj, op, region, rv3d):
                 except IndexError:
                     ms.glfree = True
                 except:
-                    # print("Unexpected error:" + str(exc_info()))
-                    # if error, disable segment
+                    print("Unexpected error:" + str(exc_info()))
                     pass
 
     return