refactoring: added comment

src/fakultaet/main.c

@@ -5,6 +5,7 @@
 int main() {
 	// minInput is set to 0 so there won't be any negative numbers
 	int minInput = 0;
+	// maxInput is set to 12 because 13 would be too big for int
 	int maxInput = 12;
 
 	int number = usergetd("Enter a positive number below 13: "), minInput, maxInput);