Fix Coverity 1194949: Copy-paste error in gr_opengl_bitmap_ex()

git-svn-id: svn://svn.icculus.org/fs2open@10575 387891d4-d844-0410-90c0-e4c51a9137d3
Fix Coverity 1093376: Copy-paste error in ade_table_entry::OutputMeta()

git-svn-id: svn://svn.icculus.org/fs2open@10576 387891d4-d844-0410-90c0-e4c51a9137d3
Fix Coverity 1093493: Missing break in switch statement. No logical reason why LE_ORDER_EVADE should fall through to LE_ORDER_STAY_NEAR. Only switch statement in block without a break statement further indicates an oversight.

git-svn-id: svn://svn.icculus.org/fs2open@10577 387891d4-d844-0410-90c0-e4c51a9137d3
Related to Coverity 1093623: The self-assignment at present has no effect

git-svn-id: svn://svn.icculus.org/fs2open@10578 387891d4-d844-0410-90c0-e4c51a9137d3
Fix Coverity 1093302: Unchecked return value. This is the only occasion where the return value of ship_get_by_signature() is not checked. Likely oversight.

git-svn-id: svn://svn.icculus.org/fs2open@10579 387891d4-d844-0410-90c0-e4c51a9137d3
Fix Coverity 1093306: Whilst the return value was not checked in beam.cpp, the correct fix is to convert the function to void given no location actually checks the return value.

git-svn-id: svn://svn.icculus.org/fs2open@10580 387891d4-d844-0410-90c0-e4c51a9137d3
Fix Coverity 1093381: Resource leak in object due to absence of destructor. Provided that release() has already been called, which would mean memory has been cleaned up on most paths, this destructor will be in essence a NOP (or close to it). If memory has typically not been cleaned up already, this addition will improve memory usage over time.

git-svn-id: svn://svn.icculus.org/fs2open@10581 387891d4-d844-0410-90c0-e4c51a9137d3