Fix save/restore of contexts which have pending exceptions
Detail: s/Module - Fixed context save & restore code to ensure FPEXC EX & FP2V bits are clear when accessing FPSCR and the main VFP registers. Without doing this, attempting to save or restore a context which has a pending exception will trigger an exception itself. Test/test2,ffb - Simple test to make sure save/restore of contexts with pending exceptions works properly Test/test1,ffb - Added brief description, changed file from plain text to tokenised BASIC to prevent it accidentally happening later on Admin: Tested on Raspberry Pi Programs which need support code to run or trigger math exceptions no longer trigger an undefined instruction abort from within VFPSupport Version 0.05. Tagged as 'VFPSupport-0_05'
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