symb: Add missing stat checks to symbDump()
C backend: Emit main()'s argv with clang-compatible dtype
parser: Clarify hPatchByvalResultToSelf()'s handling of BYREF results

symbProcRecalcRealType() already takes BYREF results into account, so
recalculating it doesn't cause issues, it's just unnecessary. This adjusts
hPatchByvalResultToSelf() to avoid doing it.