py-watchdog: does not build on snowleopard

[petrrr]

This was observed on the Snow Leopard buildbot. The fsevents extention does not build build on Snow Leopard's gcc compiler. Apparently one of the options is not supported by the compiler.

running build_ext
building '_watchdog_fsevents' extension
creating build/temp.macosx-10.6-x86_64-2.7
creating build/temp.macosx-10.6-x86_64-2.7/src
/usr/bin/gcc-4.2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch x86_64 -DWATCHDOG_VERSION_STRING="0.8.3" -DWATCHDOG_VERSION_MAJOR=0 -DWATCHDOG_VERSION_MINOR=8 -DWATCHDOG_VERSION_BUILD=3 -I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/watchdog_fsevents.c -o build/temp.macosx-10.6-x86_64-2.7/src/watchdog_fsevents.o -std=c99 -pedantic -Wall -Wextra -fPIC -Wno-error=unused-command-line-argument-hard-error-in-future
cc1: error: -Werror=unused-command-line-argument-hard-error-in-future: No option -Wunused-command-line-argument-hard-error-in-future
error: command '/usr/bin/gcc-4.2' failed with exit status 1
Command failed:  cd "/opt/local/var/macports/build/_opt_mports_dports_python_py-watchdog/py27-watchdog/work/watchdog-0.8.3" && /opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 setup.py --no-user-cfg build 
Exit code: 1

[petrrr]

Done in [7fc0538dc25623a655f81f6fd465e83579056b8d/macports-ports].