Parser fix for lambdas

frog/member.dart

Index: frog/member.dart
diff --git a/frog/member.dart b/frog/member.dart
index f2481da856da483d5dbecefc5793b10d64831e46..570dce4f4d38ba7656c66c690bf87fdb2bd2da43 100644
--- a/frog/member.dart
+++ b/frog/member.dart
@@ -35,13 +35,15 @@ class Parameter {
           definition.value.span.start == definition.span.start) {
         return;
       }
-      if (method.isAbstract) {
-        world.error('default value not allowed on abstract methods',
-          definition.span);
-      } else if (method.name == '\$call' && method.definition.body == null) {
+      if (method.name == '\$call') {
         // TODO(jimhug): Need simpler way to detect "true" function types vs.
         //   regular methods being used as function types for closures.
-        world.error('default value not allowed on function type',
+        if (method.definition.body == null) {
+          world.error('default value not allowed on function type',
+            definition.span);
+        }
+      } else if (method.isAbstract) {
+        world.error('default value not allowed on abstract methods',
           definition.span);
       }
     } else if (isInitializer && !method.isConstructor) {