* xpdf/Makefile.am (INCLUDES):
* shell/Makefile.am (INCLUDES):
* lib/ggv-sidebar/Makefile.am (INCLUDES):
* configure.in: Changed the way WARN_CFLAFS & WARN_CXXFLAGS
were passed to compiler. Now use CFLAGS/CXXFLAGS in configure
instead of INCLUDES in some Makefiles.