Fixes glean glsl1 test: texture2D(), with bias.

va_list is a mutable iterator. When passed to a function it will likely
point to somewhere else.

This fixes segmentation fault in glean vertProg1 on Ubuntu 9.10.

lp_setup_flush has effect immediately.

Fixes piglit provoking-vertex.

Otherwise drivers that bake the full blend state in a key end up having
uninitialized memory in their key.

Courtesy of valgrind.

Fixes fdo 27823.

As the argument in general might not be a constant.

allows the swrastg_dri.so to be built with llvmpipe, also links llvm
to all dri drivers

use --enable-gallium-llvm to use it.

Signed-off-by: Dave Airlie <airlied@redhat.com>

This silences Coverity assign_where_compare_meant warnings.

Something is wrong with the images strides when compressing/decompressing
images...

Based on Stephen Johnson's feedback.

Try to specify render target bindings flags first.  If that fails, try
again with just sampler view binding.  Note that we try to create the
texture resource with render target binding flags later when we allocate
the texture.  Then, in FBO validation, we check if we can actually render
to the textures.  If that fails, we generate GL_FRAMEBUFFER_UNSUPPORTED_EXT.

Changes suggested by Jose.

Plus, update comments and formatting.