Some configure tests broken with -Werror

[Christian Stimming]

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During checking whether gnucash easily builds I discovered that several 
configure tests fail when -Werror is enabled! In particular, configure.in:554 

dnl check for nl_langinfo(D_FMT) which is missing on FreeBSD
LANGINFO_D_FMT_CHECK

fails with the error message given below. Of course this is a BAD THING (tm), 
because this will probably result in a non-translated build for no known 
reason. AFAIK this check is currently the only one that fails only because of 
- -Werror / --enable-error-on-warning. Can we somehow get along without this 
one? Otherwise we need to disable --enable-error-on-warning by default, 
because the common user will only wonder why his langinfo isn't recognized.

Christian


configure:12749: gcc -o conftest -g -Wall -Werror   conftest.c -lm  >&5
cc1: warnings being treated as errors
configure: In function `main':
configure:12742: warning: unused variable `cs'
configure:12752: $? = 1
configure: failed program was:
#line 12737 "configure"
#include "confdefs.h"
#include <langinfo.h>
int
main ()
{
char* cs = nl_langinfo(D_FMT);
  ;
  return 0;
}
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