iOS: Init CLLocationCoordinate2D variables with kCLLocationCoordinate2DInvalid

- Check if variable is valid by CLLocationCoordinate2DIsValid()

Author: GitToTheHub

src/ios/GoogleMaps/PluginMapViewController.m

@@ -189,7 +189,8 @@ - (void)mapView:(GMSMapView *)mapView didTapAtCoordinate:(CLLocationCoordinate2D
 
   //
   maxZIndex = -1;
-  CLLocationCoordinate2D touchPoint;
+  CLLocationCoordinate2D touchPoint = kCLLocationCoordinate2DInvalid;
+
   for (i = 0; i < [boundsHitList count]; i++) {
     key = [boundsHitList objectAtIndex:i];
     //plugin = [boundsPluginList objectAtIndex:i];
@@ -257,7 +258,7 @@ - (void)mapView:(GMSMapView *)mapView didTapAtCoordinate:(CLLocationCoordinate2D
 
   }
 
-  if (hitKey != nil) {
+  if (hitKey != nil && CLLocationCoordinate2DIsValid(touchPoint)) {
     NSArray *tmp = [hitKey componentsSeparatedByString:@"_"];
     NSString *eventName = [NSString stringWithFormat:@"%@_click", [tmp objectAtIndex:0]];
     [self triggerOverlayEvent:eventName overlayId:hitKey coordinate:touchPoint];

src/ios/GoogleMaps/PluginUtil.m

@@ -296,7 +296,7 @@ + (CLLocationCoordinate2D)isPointOnTheGeodesicLine:(GMSPath *)path coordinate:(C
 
   double minDistance = 999999999;
   double distance;
-  CLLocationCoordinate2D mostClosePoint;
+  CLLocationCoordinate2D mostClosePoint = kCLLocationCoordinate2DInvalid;
 
   for (int i = 0; i < [inspectPoints count]; i++) {
     distance = GMSGeometryDistance([inspectPoints coordinateAtIndex:i], point);