Update depth_write.fs

examples/shaders/resources/shaders/glsl100/depth_write.fs

@@ -1,11 +1,13 @@
 #version 100
-
 #extension GL_EXT_frag_depth : enable          
+
 precision mediump float;
 
+// Input vertex attributes (from vertex shader)
 varying vec2 fragTexCoord;
 varying vec4 fragColor;
 
+// Input uniform values
 uniform sampler2D texture0;
 uniform vec4 colDiffuse;