Fix accidental string concatenation that broke Steam Heretic IWAD
detection (thanks Dragonsbrethren).

Subversion-branch: /branches/v2-branch
Subversion-revision: 2711
Fix bug with freeing of static strings, accidentally introduced in
r2633.

Subversion-branch: /branches/v2-branch
Subversion-revision: 2712
Correct up/down look logic that was incorrectly allowing 6 degrees of
additional freedom.

Subversion-branch: /branches/v2-branch
Subversion-revision: 2713
Use OPL MIDI playback as the default music device.

Subversion-branch: /branches/v2-branch
Subversion-revision: 2714
Fix icon at multiplayer wait screen (thanks Alexandre Xavier).

Subversion-branch: /branches/v2-branch
Subversion-revision: 2715
Disable file selector dialog on Windows.

Subversion-branch: /branches/v2-branch
Subversion-revision: 2716
Oops.

Subversion-branch: /branches/v2-branch
Subversion-revision: 2717