1.2.69 $SAFEFPUEXCEPTIONS Wait when storing FPU values on Intel x86

This boolean directives controls how the compiler generates code to store FPU values. If set to ON, the compiler inserts a FWAIT opcode after the store of a floating point value, so any errors are reported at once. This slows down code, but makes sure that the errors are reported on the location where the instruction was executed.