m!m's fix for Mantis #3131: contrary to the xt change from r11138, NULL is only returned on vm_malloc failure (so should never happen in normal execution)

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11179 387891d4-d844-0410-90c0-e4c51a9137d3
improve sexp code for obtaining pitch/bank/heading with the following changes: 1) use an alternate algorithm for extracting angles from an orientation matrix 2) properly round floats to integers when converting to degrees

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11180 387891d4-d844-0410-90c0-e4c51a9137d3
remove the Error (originally Assert) from r1675 and add back the comment removed in r8005

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11181 387891d4-d844-0410-90c0-e4c51a9137d3
minor reorganization

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11182 387891d4-d844-0410-90c0-e4c51a9137d3
added a sexp to pause and unpause music that is currently playing

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11183 387891d4-d844-0410-90c0-e4c51a9137d3
it's good to check whether the music is paused, for bulletproof-ness

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11184 387891d4-d844-0410-90c0-e4c51a9137d3
when the game returns from a paused state, don't unpause the music paused by sexp

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11185 387891d4-d844-0410-90c0-e4c51a9137d3
this should fix Mantis #2888 (allow for head.ani files without letter suffixes)

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11186 387891d4-d844-0410-90c0-e4c51a9137d3
a more future-proof way to keep track of explicitly paused audio

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@11187 387891d4-d844-0410-90c0-e4c51a9137d3