Linux (gtk): Initialize VideoFilter with the number of CPU cores instead of hard-coded to 4 threads.


git-svn-id: https://svn.code.sf.net/p/desmume/code/trunk@5016 5577840e-afb3-4e59-9ef3-2b7f898b1952
Linux (gtk): Change pause/resume to Pause button.


git-svn-id: https://svn.code.sf.net/p/desmume/code/trunk@5017 5577840e-afb3-4e59-9ef3-2b7f898b1952
dont crash if save/loadstating 0 bytes of backup memory

git-svn-id: https://svn.code.sf.net/p/desmume/code/trunk@5018 5577840e-afb3-4e59-9ef3-2b7f898b1952