qkeyword: don't crash while processing an empty set

using -p/-c one can restrict to a possibly empty set, just bail on that,
don't crash

Signed-off-by: Fabian Groffen <grobian@gentoo.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/qkeyword.c b/qkeyword.c
index 17430fc..8c781db 100644
--- a/qkeyword.c
+++ b/qkeyword.c
@@ -411,6 +411,12 @@ qkeyword_stats(cache_pkg_ctx *pkg_ctx, void *priv)
 		char **arch;
 		const char border[] = "------------------------------------------------------------------";
 
+		/* no packages, nothing to report */
+		if (current_package_keywords == NULL) {
+			printf("no packages found\n");
+			return EXIT_SUCCESS;
+		}
+
 		/* include stats for last package */
 		for (a = 0; a < archlist_count; a++) {
 			switch (current_package_keywords[a]) {