Fix Mantis 3029: Clang warning: expression result unused in multi_pinfo_blit_squadron_logo()

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10556 387891d4-d844-0410-90c0-e4c51a9137d3
Fix issue 3030: Clang warning: semantic issue, '&&' within '||' in gr_[re|un]size_screen_pos() and gr_[re|un]size_screen_posf()

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10557 387891d4-d844-0410-90c0-e4c51a9137d3