Android buildfix.
Walk a pointer when enqueuing audio.

Profiler says this will give ~0.5% perf improvement.
Don't check that the pc is valid every single op.
Use memcpy also in Step_Color8888().
Save fullscreen option to config
Merge pull request #531 from unknownbrackets/perf

Small performance improvements
Merge pull request #532 from raven02/fs-fix

Save fullscreen option to config
0.6.1
Merge pull request #533 from lioncash/master

outtextlimit and outtextlength should be unsigned.
numWaitThreads and numMessages should be unsigned. Everyone knows positive threading is for cool kids.

Kills a typecast in the process.