Check return value of glfwGetKeyName

1 files changed, 5 insertions, 4 deletions

diff --git a/xnote.c b/xnote.c
index c35193c..0541374 100644
--- a/xnote.c
+++ b/xnote.c
@@ -155,12 +155,12 @@ undo(void)
 		case EVENT_START_LINE:
 		case EVENT_START_NOTE:
 		case EVENT_START:
-			goto exit;
+			break;
 		default:
 			continue;
 		}
+		break;
 	}
-exit:
 	shrink(&events, event_count, &event_cap, sizeof(enum event));
 }
 
@@ -244,9 +244,10 @@ static void
 key_press_cb(GLFWwindow *window, int key, int scancode, int action, int mods)
 {
 	if (action == GLFW_PRESS || action == GLFW_REPEAT) {
-		if ((mods & GLFW_MOD_CONTROL) && !strcmp(glfwGetKeyName(key, scancode), "z")) {
+		const char *keysym = glfwGetKeyName(key, scancode);
+		if ((mods & GLFW_MOD_CONTROL) && keysym && !strcmp(keysym, "z")) {
 			if (event_count) undo();
-		} else if ((mods & GLFW_MOD_CONTROL) && !strcmp(glfwGetKeyName(key, scancode), "c")) {
+		} else if ((mods & GLFW_MOD_CONTROL) && keysym && !strcmp(keysym, "c")) {
 			for (size_t i = 0; i < line_count; i++)
 				free(lines[i].points);
 			line_count = 0;