refs #186: don't begin tap gesture zooms in/out if at max/min zoom

@@ -1561,6 +1561,8 @@
 
 - (void)doubleTapAtPoint:(CGPoint)aPoint
 {
+    if (self.zoom < self.maxZoom)
+    {
         [self registerZoomEventByUser:YES];
 
         if (self.zoomingInPivotsAroundCenter)
@@ -1577,6 +1579,7 @@
 
             [self zoomInToNextNativeZoomAt:aPoint animated:YES];
         }
+    }
 
     if (_delegateHasDoubleTapOnMap)
         [_delegate doubleTapOnMap:self at:aPoint];
@@ -1615,6 +1618,8 @@
 
 - (void)handleTwoFingerSingleTap:(UIGestureRecognizer *)recognizer
 {
+    if (self.zoom > self.minZoom)
+    {
         [self registerZoomEventByUser:YES];
 
         CGPoint centerPoint = [self convertPoint:self.center fromView:self.superview];
@@ -1623,6 +1628,7 @@
             centerPoint = [self coordinateToPixel:self.userLocation.location.coordinate];
 
         [self zoomOutToNextNativeZoomAt:centerPoint animated:YES];
+    }
 
     if (_delegateHasSingleTapTwoFingersOnMap)
         [_delegate singleTapTwoFingersOnMap:self at:[recognizer locationInView:self]];