Fix setting uniforms; chrome-rgba shader works, but lacks alpha blending.

glsl/chrome-rgba.vert

@@ -1,8 +1,8 @@
 uniform vec2 r1;
 uniform vec2 r2;		// matrix elements
-
 void main()
 {
-	vec2 p = gl_Vertex.xy*vec2(0.001538462,-0.0025) + vec2(-1,1);
+	vec2 p = gl_Vertex.xy*r1 + r2;
 	gl_Position = vec4(p.x,p.y,0,1);
+	gl_TexCoord[0]  = gl_MultiTexCoord0;
 }