Merge pull request #15518 from volzhs/shader-compile-error-android

Fix shader compile error on Android

drivers/gles3/shaders/effect_blur.glsl

@@ -214,7 +214,7 @@ void main() {
 
 	vec4 color_accum = vec4(0.0);
 
-	float max_accum=0;
+	float max_accum=0.0;
 
 	for(int i=0;i<dof_kernel_size;i++) {