avm2: Stub more TextField getLine methods

core/src/avm2/globals/flash/text/TextField.as

@@ -138,5 +138,15 @@ package flash.text {
             stub_method("flash.text.TextField", "getCharIndexAtPoint");
             return 0;
         }
+
+        public function getLineLength(lineIndex:int):int {
+            stub_method("flash.text.TextField", "getLineLength");
+            return 0;
+        }
+
+        public function getLineText(lineIndex:int):String {
+            stub_method("flash.text.TextField", "getLineText");
+            return "";
+        }
     }
 }