pidgin-webkit don't work with message styles with lower case extension name

I discovered pidgin-webkit last night and it's a amazing piece of software! It's so cool that I am willing to help, and this project can't die :) . I've been waiting for a long time to have a conversation with google-talk like style. The worst thing that pidgin had was the conversation style, now this problem is gone for me!

If I have a theme that doesn't have the default ".AdiumMessageStyle" like this one http://adiumxtras.com/index.php?a=xtras&xtra_id=5367 that has ".adiumMessageStyle" as extension won't even show at the preferences.

I don't know if its a real bug, but since it seems to work and to be recognized with no problems in adium. I don't have adium nor a mac, but there isn't any comments complaning on that.

I know C but I am not very familiarized with gtk and this kind of programming. Anyway I will take this as a opportunity to learn more and improve my (not so good) C skills. So I wrote a patch to fix this issue.

Hope the code isn't that bad written. I will try to help this project as much as I can.