Blender 2.79 invalid syntax fix

[jayakusuma13]

replaced the colon ( : ) with equal sign ( = ) on line 35, line 41, and line 51

[stuffmatic]

Hello! This looks like the inverse of #9. Could you explain what this does, for what blender version(s) etc?

[jayakusuma13]

Oh sorry i forgot to mention it. In my Blender 2.79b, the v1.0.3 version gave me an invalid syntax error, so i had to replace the colon with = sign to fix it.

[stuffmatic]

The syntax you introduce in this PR (and that was used previously in the add-on code) causes a deprecation warning in 2.80+. The point of merging #9 was to ensure compatibility with Blender 2.80 and beyond at the expense of support for earlier Blender versions. If you can find a way of solving this issue in a way that works for 2.79 without causing warnings/errors in 2.80+, then that would be very nice!