Fixed 45-cal magazine icon filling inversion

Replaces this:
![zxnlltv](https://f.cloud.github.com/assets/1291682/2493893/486257ba-b2ab-11e3-8dec-34208e077a66.png)
With this:
![45s](https://f.cloud.github.com/assets/1291682/2493895/4eb8a8da-b2ab-11e3-8fcd-d7267def997a.png)