prevent multiple map-updates (PokemonGoF#1817)

* prevent multiple map-updates

In case a map-update took longer than 5s, multiple updates were started, this is a simple fix so there is always only one map-update running

* updated formatting

* updated formatting ^2

static/map.js

@@ -14,6 +14,7 @@ var excludedPokemon = [];
 var notifiedPokemon = [];
 
 var map;
+var rawDataIsLoading = false;
 var locationMarker;
 
 var light2Style=[{"elementType":"geometry","stylers":[{"hue":"#ff4400"},{"saturation":-68},{"lightness":-4},{"gamma":0.72}]},{"featureType":"road","elementType":"labels.icon"},{"featureType":"landscape.man_made","elementType":"geometry","stylers":[{"hue":"#0077ff"},{"gamma":3.1}]},{"featureType":"water","stylers":[{"hue":"#00ccff"},{"gamma":0.44},{"saturation":-33}]},{"featureType":"poi.park","stylers":[{"hue":"#44ff00"},{"saturation":-23}]},{"featureType":"water","elementType":"labels.text.fill","stylers":[{"hue":"#007fff"},{"gamma":0.77},{"saturation":65},{"lightness":99}]},{"featureType":"water","elementType":"labels.text.stroke","stylers":[{"gamma":0.11},{"weight":5.6},{"saturation":99},{"hue":"#0091ff"},{"lightness":-86}]},{"featureType":"transit.line","elementType":"geometry","stylers":[{"lightness":-48},{"hue":"#ff5e00"},{"gamma":1.2},{"saturation":-23}]},{"featureType":"transit","elementType":"labels.text.stroke","stylers":[{"saturation":-64},{"hue":"#ff9100"},{"lightness":16},{"gamma":0.47},{"weight":2.7}]}];
@@ -508,7 +509,17 @@ function loadRawData() {
             'neLat': neLat,
             'neLng': neLng
         },
-        dataType: "json"
+        dataType: "json",
+        beforeSend: function() {
+            if (rawDataIsLoading) {
+                return false;
+            } else {
+                rawDataIsLoading = true;
+            }
+        },
+        complete: function() {
+            rawDataIsLoading = false;
+        }
     })
 }