add test (closes #3094)

tests/unit/src/unit/issues/Issue3094.hx

@@ -0,0 +1,14 @@
+package unit.issues;
+
+class Issue3094 extends Test {
+	static inline function isNull<T>(maybeNull:Null<T>):Bool return {
+		maybeNull == null;
+	}
+
+	function test() {
+		var i:Int = 0;
+		f(isNull(i));
+		var u:UInt = 0;
+		f(isNull(u));
+	}
+}