global: fix libc constness warnings

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 file changed, 2 insertions, 1 deletion

diff --git a/shared.c b/shared.c
index 8173eb8..a39394d 100644
--- a/shared.c
+++ b/shared.c
@@ -551,7 +551,8 @@ char *expand_macros(const char *txt)
 
 char *get_mimetype_for_filename(const char *filename)
 {
-	char *ext, *mimetype, line[1024];
+	const char *ext;
+	char *mimetype, line[1024];
 	struct string_list list = STRING_LIST_INIT_NODUP;
 	int i;
 	FILE *file;