st/mesa: fix regressions in glDrawPixels(GL_STENCIL_INDEX)

We need to keep track of three different fragment shaders: Z-only, stencil-
only, and Z+stencil.  Before, we were only keeping track of the first one
we encountered.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index 89483ac04c..d342c0cff1 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -160,7 +160,7 @@ struct st_context
 
    /** for glDraw/CopyPixels */
    struct {
-      struct st_fragment_program *z_shader;
+      struct st_fragment_program *shaders[4];
       void *vert_shaders[2];   /**< ureg shaders */
    } drawpix;