quirks: add more assertion to avoid API misusage

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

src/quirks.c

@@ -1001,6 +1001,9 @@ quirks_init_subsystem(const char *data_path,
 {
 	struct quirks_context *ctx = zalloc(sizeof *ctx);
 
+	assert(data_path);
+	assert(libinput);
+
 	ctx->refcount = 1;
 	ctx->log_handler = log_handler;
 	ctx->log_type = log_type;