Moved selection of I915 hack out of the YUV shader.

client/deps/glbench/src/yuv2rgb_1.glslf

Index: client/deps/glbench/src/yuv2rgb_1.glslf
diff --git a/client/deps/glbench/src/yuv2rgb_1.glslf b/client/deps/glbench/src/yuv2rgb_1.glslf
index c30ef2643dc371771cb42409a5652d5d2311667a..228e6a934a34a34dc22cf1d7f013a1a813000a67 100644
--- a/client/deps/glbench/src/yuv2rgb_1.glslf
+++ b/client/deps/glbench/src/yuv2rgb_1.glslf
@@ -33,7 +33,6 @@
  * This is a conversion of a cg shader from Chrome:
  * http://src.chromium.org/viewvc/chrome/trunk/src/o3d/samples/shaders/yuv2rgb.shader
  */
-#define I915_WORKAROUND 1
 
 /*
  * This shader takes a Y'UV420p image as a single greyscale plane, and
@@ -178,7 +177,7 @@ void main() {
    * the location in the image stream, using floor in several places
    * which makes it hard to use parametric coordinates.
    */
-#if I915_WORKAROUND
+#if defined(I915_WORKAROUND)
   vec2 pixelPosition = vec2(floor(imageWidth * gl_TexCoord[0].x),
                             floor(imageHeight * gl_TexCoord[0].y));
 #else
@@ -190,7 +189,7 @@ void main() {
    * We can use the parametric coordinates to get the Y channel, since it's
    * a relatively normal image.
    */
-#if I915_WORKAROUND
+#if defined(I915_WORKAROUND)
   float yChannel = getYPixel(vec2(gl_TexCoord[0]));
 #else
   float yChannel = getYPixel(vec2(v1));