Fixed post vertex shader projection calculation for glsl<1.5

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10139 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core-effects/Common/MatDefs/Post/Post.vert

@@ -5,6 +5,7 @@ attribute vec2 inTexCoord;
 varying vec2 texCoord;
 
 void main() {  
-    gl_Position = inPosition * 2.0 - 1.0; //vec4(pos, 0.0, 1.0);
+    vec2 pos = (g_WorldViewProjectionMatrix * inPosition).xy;
+    gl_Position = vec4(pos, 0.0, 1.0);    
     texCoord = inTexCoord;
 }