GDScript compiler subclass bugfixes

modules/gdscript/tests/scripts/analyzer/features/inner_base.gd

@@ -0,0 +1,18 @@
+extends InnerA
+
+func test():
+	super.test()
+
+class InnerA extends InnerAB:
+	func test():
+		print("InnerA.test")
+		super.test()
+
+	class InnerAB extends InnerB:
+		func test():
+			print("InnerA.InnerAB.test")
+			super.test()
+
+class InnerB:
+	func test():
+		print("InnerB.test")