Switch to Mesa 7.9.

media-libs/mesa/files/7.9-gldeletebuffers.patch

+From 78587ea0122d34e13c078d095aa5b730ce24bb73 Mon Sep 17 00:00:00 2001
+From: Brian Paul <brianp@vmware.com>
+Date: Thu, 11 Nov 2010 22:31:28 +0000
+Subject: mesa: fix glDeleteBuffers() regression
+
+This fixes a regression (failed assertion) from commit
+c552f273f559968dfd770367e25329baccbcd0c4 which was hit if glDeleteBuffers()
+was called on a buffer that was never bound.
+
+NOTE: this is a candidate for the 7.9 branch.
+---
+diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
+index df44fbe..4d62f54 100644
+--- a/src/mesa/main/bufferobj.c
++++ b/src/mesa/main/bufferobj.c
+@@ -998,7 +998,7 @@ _mesa_DeleteBuffersARB(GLsizei n, const GLuint *ids)
+          struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
+          GLuint j;
+ 
+-         ASSERT(bufObj->Name == ids[i]);
++         ASSERT(bufObj->Name == ids[i] || bufObj == &DummyBufferObject);
+ 
+          if (_mesa_bufferobj_mapped(bufObj)) {
+             /* if mapped, unmap it now */
+@@ -1039,7 +1039,7 @@ _mesa_DeleteBuffersARB(GLsizei n, const GLuint *ids)
+          }
+ 
+          /* The ID is immediately freed for re-use */
+-         _mesa_HashRemove(ctx->Shared->BufferObjects, bufObj->Name);
++         _mesa_HashRemove(ctx->Shared->BufferObjects, ids[i]);
+          _mesa_reference_buffer_object(ctx, &bufObj, NULL);
+       }
+    }
+--
+cgit v0.8.3-6-g21f6