read_config: fix leak on error

Found through static analysis.

1 files changed, 2 insertions, 0 deletions

diff --git a/sway/config.c b/sway/config.c
index 12a02163..d3040a67 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -583,6 +583,8 @@ bool read_config(FILE *file, struct sway_config *config) {
                 }
                 char *expanded = expand_line(block, line, brace_detected > 0);
                 if (!expanded) {
+                        list_foreach(stack, free);
+                        list_free(stack);
                         return false;
                 }
                 wlr_log(L_DEBUG, "Expanded line: %s", expanded);