git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/server-info.c b/server-info.c
index a051e49a9ea2f605bdc278394de731ff4c55e627..c1c073b2f05a48772a45602cdc711eef6e211695 100644 (file)
--- a/server-info.c
+++ b/server-info.c
@@ -101,7 +101,7 @@ static int read_pack_info_file(const char *infofile)
 
        while (fgets(line, sizeof(line), fp)) {
                int len = strlen(line);
-               if (line[len-1] == '\n')
+               if (len && line[len-1] == '\n')
                        line[--len] = 0;
 
                if (!len)