Fix the return value of PPCAnalyst.
In situations where conditional continue isn't supported + if a JIT doesn't implement a instruction that has the FL_ENDBLOCK flag. This would cause an
infinite loop.
In reality all the JITs should implement every FL_ENDBLOCK instruction regardless, but JITIL doesn't implement tw/twi which are FL_ENDBLOCK
instructions.
Merge pull request #1052 from Sonicadvance1/fix-ppcAnalyst-return

Fix the return value of PPCAnalyst.