silence uninitialized var warning

diff --git a/src/mesa/shader/nvvertexec.c b/src/mesa/shader/nvvertexec.c
index 75dfd7383c04ce1a4f83fec706a8e565eb953e70..f8cdfbf17a7e114c3b24b71bf3c65d5134d14ccc 100644 (file)
--- a/src/mesa/shader/nvvertexec.c
+++ b/src/mesa/shader/nvvertexec.c
@@ -773,6 +773,7 @@ _mesa_exec_vertex_program(GLcontext *ctx,
                cross[0] = t[1] * u[2] - t[2] * u[1];
                cross[1] = t[2] * u[0] - t[0] * u[2];
                cross[2] = t[0] * u[1] - t[1] * u[0];
+               cross[3] = 0.0;
                store_vector4( inst, machine, cross );
             }
             break;