fixes #166: callout fixes for shapes & circles

@@ -70,6 +70,8 @@
     circlePath = NULL;
     [self updateCirclePathAnimated:NO];
 
+    self.masksToBounds = NO;
+
     return self;
 }
 

@@ -1472,6 +1472,22 @@
     else
     {
         [self correctPositionOfAllAnnotationsIncludingInvisibles:NO animated:(_mapScrollViewIsZooming && !_mapScrollView.zooming)];
+
+        if (_currentAnnotation && ! [_currentAnnotation isKindOfClass:[RMMarker class]])
+        {
+            // adjust shape annotation callouts for frame changes during zoom
+            //
+            _currentCallout.delegate = nil;
+
+            [_currentCallout presentCalloutFromRect:_currentAnnotation.layer.bounds
+                                            inLayer:_currentAnnotation.layer
+                                 constrainedToLayer:self.layer
+                           permittedArrowDirections:SMCalloutArrowDirectionDown
+                                           animated:NO];
+
+            _currentCallout.delegate = self;
+        }
+
         _lastZoom = _zoom;
     }
 

@@ -85,7 +85,7 @@
     previousBounds = CGRectZero;
     lastScale = 0.0;
 
-    self.masksToBounds = YES;
+    self.masksToBounds = NO;
 
     scaleLineWidth = NO;
     scaleLineDash = NO;