Added support for gif animation

util.c

@@ -87,6 +87,19 @@ void die(const char* fmt, ...) {
 	exit(1);
 }
 
+int min_int_nz(int n, ...) {
+	va_list args;
+	int i, a, m = 0;
+
+	va_start(args, n);
+	for (i = 0; i < n; i++) {
+		if ((a = va_arg(args, int)) && (!m || a < m))
+			m = a;
+	}
+	va_end(args);
+	return m;
+}
+
 void size_readable(float *size, const char **unit) {
 	const char *units[] = { "", "K", "M", "G" };
 	int i;