Extend the VideoColourSpace matrix to 4x4.

This allows it to be used directly to update a GLSL mat4 data type and
ensures a simple conversion to QMatrix4x4 when Qt 4.6 becomes the
minimum Qt requirement.

mythtv/libs/libmythtv/videocolourspace.cpp

@@ -13,6 +13,7 @@ Matrix::Matrix(float m11, float m12, float m13, float m14,
     m[0][0] = m11; m[0][1] = m12; m[0][2] = m13; m[0][3] = m14;
     m[1][0] = m21; m[1][1] = m22; m[1][2] = m23; m[1][3] = m24;
     m[2][0] = m31; m[2][1] = m32; m[2][2] = m33; m[2][3] = m34;
+    m[3][0] = m[3][1] = m[3][2] = m[3][3] = 1.0f;
 }
 
 Matrix::Matrix()

mythtv/libs/libmythtv/videocolourspace.h

@@ -18,7 +18,7 @@ class Matrix
     Matrix & operator*=(const Matrix &r);
     void product(int row, const Matrix &r);
     void debug(void);
-    float m[3][4];
+    float m[4][4];
 };
 
 typedef enum VideoCStd