Fix namespace violation

bin/xbps-pkgdb/check.c

@@ -36,11 +36,11 @@
 #include "defs.h"
 
 static int
-pkgdb_cb(struct xbps_handle *xhp _unused,
+pkgdb_cb(struct xbps_handle *xhp UNUSED,
 		xbps_object_t obj,
-		const char *key _unused,
+		const char *key UNUSED,
 		void *arg,
-		bool *done _unused)
+		bool *done UNUSED)
 {
 	const char *pkgver;
 	char *pkgname;

bin/xbps-pkgdb/check_pkg_unneeded.c

@@ -43,7 +43,7 @@
  * 	  and remove them if that was true.
  */
 int
-check_pkg_unneeded(struct xbps_handle *xhp _unused, const char *pkgname, void *arg)
+check_pkg_unneeded(struct xbps_handle *xhp UNUSED, const char *pkgname, void *arg)
 {
 	xbps_array_t replaces;
 	xbps_dictionary_t pkgd = arg;