new upgade042 pactest + bugfix in chk_filedifference.

This adds a pactest for the relocation of a config file between two packages
(case of etc/profile moving from bash to filesystem).
While running this pactest, I found out that chk_filedifference didn't work
correctly with an empty list as second argument. So that's fixed now.

Ref: http://www.archlinux.org/pipermail/pacman-dev/2007-December/010610.html

Signed-off-by: Chantry Xavier <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/libalpm/conflict.c b/lib/libalpm/conflict.c
index 91f43602..5c53b961 100644
--- a/lib/libalpm/conflict.c
+++ b/lib/libalpm/conflict.c
@@ -251,6 +251,10 @@ static alpm_list_t *chk_filedifference(alpm_list_t *filesA, alpm_list_t *filesB)
 	alpm_list_t *ret = NULL;
 	alpm_list_t *pA = filesA, *pB = filesB;
 
+	if(pB == NULL) {
+		return(alpm_list_strdup(pA));
+	}
+
 	while(pA && pB) {
 		const char *strA = pA->data;
 		const char *strB = pB->data;