policycoreutils/semodule_package: fix debug build

Building from the root directory with "make DEBUG=1" enables -Wshadow
option.  This makes the compilation fail with the following error:

  semodule_unpackage.c: In function 'usage':
  semodule_unpackage.c:17:25: error: declaration of 'progname' shadows a global declaration [-Werror=shadow]
   static void usage(char *progname)
                         ^
  semodule_unpackage.c:14:7: error: shadowed declaration is here [-Werror=shadow]
   char *progname = NULL;
         ^

Fix this error by no longer passing a global variable as a parameter to
usage function.

Acked-by: Steve Lawrence <slawrence@tresys.com>
1 file changed