gallivm: silence a couple compiler warnings

Silence warnings about possibly uninitialized variables when making a
release build.

Reviewed-by: José Fonseca <[email protected]>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.c b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
index 8cee994ee6d..093c8fcc748 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
@@ -411,6 +411,9 @@ lp_build_rho(struct lp_build_sample_context *bld,
          if (dims > 2) {
             ddx_ddy[1] = lp_build_abs(coord_bld, ddx_ddy[1]);
          }
+         else {
+            ddx_ddy[1] = NULL; /* silence compiler warning */
+         }
 
          if (dims < 2) {
             rho_xvec = lp_build_swizzle_aos(coord_bld, ddx_ddy[0], swizzle0);