Reinitialize music when hotloading. Fixes crash when hotloading GUI files.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15271 3db68df2-c116-0410-a063-a993310a9797
Since the VFS logs the missing files now, there's no reason to crash on it.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15272 3db68df2-c116-0410-a063-a993310a9797
code style cleanup

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15273 3db68df2-c116-0410-a063-a993310a9797
Fix non-PCH build.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15274 3db68df2-c116-0410-a063-a993310a9797
Petra: code rearrangement + small improvments

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15275 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'