message: Initialise color when doing manual resolve on GL
diff: @@ -252,6 +252,8 @@ vec4 SampleTextureFloat4(int type, vec2 pos, float slice, int mipLevel, int samp
  {
  int sampleCount = -sampleIdx;
  + col = vec4(0, 0, 0, 0);
  +
  // worst resolve you've seen in your life
  // it's manually unrolled because doing it as a dynamic loop on
  // sampleCount seems to produce crazy artifacts on nvidia - probably a compiler bug
  @@ -313,6 +315,8 @@ vec4 SampleTextureFloat4(int type, vec2 pos, float slice, int mipLevel, int samp
  {
  int sampleCount = -sampleIdx;
  + col = vec4(0, 0, 0, 0);
  +
  // worst resolve you've seen in your life
  // it's manually unrolled because doing it as a dynamic loop on
  // sampleCount seems to produce crazy artifacts on nvidia - probably a compiler bug
  