More empty floor bugfixes

core/assets/shaders/water.frag

@@ -20,7 +20,6 @@ void main(){
 	float stime = u_time / 5.0;
 
     vec4 sampled = texture2D(u_texture, c + vec2(sin(stime/3.0 + coords.y/0.75) * v.x, 0.0));
-
     vec3 color = sampled.rgb * vec3(0.9, 0.9, 1);
 
     float tester = mod((coords.x + coords.y*1.1 + sin(stime / 8.0 + coords.x/5.0 - coords.y/100.0)*2.0) +

core/src/mindustry/world/blocks/environment/Floor.java

@@ -255,7 +255,7 @@ public class Floor extends Block{
             Point2 point = Geometry.d8[i];
             Tile other = tile.nearby(point);
 
-            if(other != null && doEdge(tile, other, other.floor()) && other.floor().cacheLayer == realCache && other.floor().edges() != null){
+            if(other != null && doEdge(tile, other, other.floor()) && other.floor().cacheLayer == realCache && other.floor().edges() != null && other.floor() != Blocks.empty){
 
                 if(!blended.getAndSet(other.floor().id)){
                     blenders.add(other.floor());