truncate buffer before reading empty files

If readfile() reads an empty file, fgets() won't truncate the buffer
and it'll still contain the contents of the previously read file.

[lh: fixed similar issue in ui-repolist.c]

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/scan-tree.c b/scan-tree.c
index cdafb02..47f3988 100644
--- a/scan-tree.c
+++ b/scan-tree.c
@@ -42,6 +42,7 @@ char *readfile(const char *path)
 
         if (!(f = fopen(path, "r")))
                 return NULL;
+        buf[0] = 0;
         fgets(buf, MAX_PATH, f);
         fclose(f);
         return buf;
diff --git a/ui-repolist.c b/ui-repolist.c
index 2c13d50..3aedde5 100644
--- a/ui-repolist.c
+++ b/ui-repolist.c
@@ -23,6 +23,7 @@ time_t read_agefile(char *path)
 
         if (!(f = fopen(path, "r")))
                 return -1;
+        buf[0] = 0;
         if (fgets(buf, sizeof(buf), f) == NULL)
                 return -1;
         fclose(f);