gallium: silence warning

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index df00293..1a5294e 100644 (file)
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -1674,6 +1674,7 @@ exec_declaration(
             break;
 
          default:
+            eval = NULL;
             assert( 0 );
          }