Fix uninitalized use of libs and cflags

Author: glensc

setup.py

@@ -39,6 +39,8 @@
 #if not os.environ.has_key('PKG_CONFIG_PATH'):
 #  os.environ['PKG_CONFIG_PATH'] = '/usr/local/lib/pkgconfig'
 
+libs = cflags = ''
+
 # Find fuse compiler/linker flag via pkgconfig
 if os.system('pkg-config --exists fuse 2> /dev/null') == 0:
     pkgcfg = os.popen('pkg-config --cflags fuse')