Update blur.glsl

made the blur spatially uniform (seemed to be a typo)

Author: markluffel

java/examples/Topics/Shaders/BlurFilter/data/blur.glsl

@@ -36,7 +36,7 @@ void main(void) {
   vec4 col8 = texture2D(texture, tc8);
 
   vec4 sum = (1.0 * col0 + 2.0 * col1 + 1.0 * col2 +  
-              2.0 * col3 + 4.0 * col4 + 2.0 * col4 +
-              1.0 * col5 + 2.0 * col6 + 1.0 * col7) / 16.0;            
+              2.0 * col3 + 4.0 * col4 + 2.0 * col5 +
+              1.0 * col6 + 2.0 * col7 + 1.0 * col8) / 16.0;            
   gl_FragColor = vec4(sum.rgb, 1.0) * vertColor;  
 }