Only use one set of macros in Gexpr.c
Only use one set of macros in Gexpr.c

Fix Gexpr macro warnings

vtjnash/libunwind,libunwind/libunwind,djwatson/libunwind,libunwind/libunwind,vtjnash/libunwind,djwatson/libunwind,frida/libunwind,frida/libunwind,djwatson/libunwind,libunwind/libunwind,vtjnash/libunwind,frida/libunwind