add condition for last layer index

Author: eczajk1

dist/angular-google-maps.js

@@ -4928,7 +4928,7 @@ Original idea from: http://stackoverflow.com/questions/22758950/google-map-drawi
           if (angular.isDefined(this.scope.index)) {
             found = false;
             if (this.gMap.overlayMapTypes.getLength()) {
-              return this.gMap.overlayMapTypes.forEach((function(_this) {
+              this.gMap.overlayMapTypes.forEach((function(_this) {
                 return function(mapType, index) {
                   var layerIndex;
                   if (!found) {
@@ -4940,6 +4940,9 @@ Original idea from: http://stackoverflow.com/questions/22758950/google-map-drawi
                   }
                 };
               })(this));
+              if (!found) {
+                return this.gMap.overlayMapTypes.push(this.mapType);
+              }
             } else {
               return this.gMap.overlayMapTypes.push(this.mapType);
             }

src/coffee/directives/api/models/parent/map-type-parent-model.coffee

@@ -99,6 +99,11 @@ angular.module('uiGmapgoogle-maps.directives.api.models.parent')
                   found = true
                   @gMap.overlayMapTypes.insertAt index, @mapType
               return
+
+            # if still not found, it just means that no layer has been found with
+            # a higher (or missing) index, so just added to the end
+            if !found
+              @gMap.overlayMapTypes.push @mapType
           else
             @gMap.overlayMapTypes.push @mapType
         else