no highp on blur shader

src/net/torvald/terrarum/gameactors/ActorWithBody.kt

@@ -1785,6 +1785,7 @@ open class ActorWithBody : Actor {
                 }
             }
 
+            batch.color = Color.WHITE
         }
     }
 

src/shaders/blur2.frag

@@ -1,6 +1,6 @@
 #version 150
 #ifdef GL_ES
-    precision highp float;
+    precision mediump float;
 #endif