Change tile map texture size to power of 2.[ci skip]

Bin/Data/Urho2D/isometric_grass_and_water.tmx

@@ -2,7 +2,7 @@
 <map version="1.0" orientation="isometric" width="25" height="25" tilewidth="64" tileheight="32">
  <tileset firstgid="1" name="isometric_grass_and_water" tilewidth="64" tileheight="64">
   <tileoffset x="0" y="16"/>
-  <image source="isometric_grass_and_water.png" width="256" height="384"/>
+  <image source="isometric_grass_and_water.png" width="256" height="512"/>
   <terraintypes>
    <terrain name="Grass" tile="0"/>
    <terrain name="Water" tile="22"/>