[cogl] opengl: Fix conditional call of BlendFuncSeparate

[Neil Roberts <nroberts src gnome org>]

commit fc292c25db3004543e277d92693ab9cb388d2121
Author: Adam Jackson <ajax redhat com>
Date:   Fri Dec 7 09:47:50 2012 -0500

    opengl: Fix conditional call of BlendFuncSeparate
    
    Checking whether src_rgb != src_alpha twice is pointless; not checking
    whether dst_rgb != dst_alpha is clearly wrong.
    
    Found by Coverity.
    
    Signed-off-by: Adam Jackson <ajax redhat com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=689850
    
    Reviewed-by: Neil Roberts <neil linux intel com>

 cogl/driver/gl/cogl-pipeline-opengl.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/cogl/driver/gl/cogl-pipeline-opengl.c b/cogl/driver/gl/cogl-pipeline-opengl.c
index 344078d..105321e 100644
--- a/cogl/driver/gl/cogl-pipeline-opengl.c
+++ b/cogl/driver/gl/cogl-pipeline-opengl.c
@@ -516,8 +516,8 @@ _cogl_pipeline_flush_color_blend_alpha_depth_state (
           if (ctx->glBlendFuncSeparate &&
               (blend_state->blend_src_factor_rgb !=
                blend_state->blend_src_factor_alpha ||
-               (blend_state->blend_src_factor_rgb !=
-                blend_state->blend_src_factor_alpha)))
+               (blend_state->blend_dst_factor_rgb !=
+                blend_state->blend_dst_factor_alpha)))
             GE (ctx, glBlendFuncSeparate (blend_state->blend_src_factor_rgb,
                                           blend_state->blend_dst_factor_rgb,
                                           blend_state->blend_src_factor_alpha,