suppressed compilation warnings when using gnulib

[Szymon Janc]

Hi all,

I've noticed that compilation warnings for regexp.c and wildcard.c are 
suppressed by CFLAGS_GNULIB. Removing it expose ftbs caused by both missing 
defines for gnulib and compilation warnings (see attached patch). I'm not sure 
how we should handle missing defines but I think that we should not suppresed 
warnings like it is done now.

Currently only regexp uses gnulib so this problem is not so important, but in 
future more modules might start using it and this should be handled somewhat 
better.  Yet, I'm not sure how.. maybe a wrapper header or CFLAGS_GNULIB_USER 
in conf/Makefile.common?

-- 
Szymon K. Janc
address@hidden // GG: 1383435

warning.patch
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