st/glsl_to_tgsi: attach image to correct instruction for samples

This fixes a crash (but not the test):
GL45-CTS.shader_texture_image_samples_tests.functional_test

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 6e9c19a..9cf204a 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -3511,9 +3511,9 @@
       st_src_reg res = get_temp(glsl_type::ivec4_type);
       st_dst_reg dstres = st_dst_reg(res);
       dstres.writemask = WRITEMASK_W;
-      emit_asm(ir, TGSI_OPCODE_RESQ, dstres);
+      inst = emit_asm(ir, TGSI_OPCODE_RESQ, dstres);
       res.swizzle = SWIZZLE_WWWW;
-      inst = emit_asm(ir, TGSI_OPCODE_MOV, dst, res);
+      emit_asm(ir, TGSI_OPCODE_MOV, dst, res);
    } else {
       st_src_reg arg1 = undef_src, arg2 = undef_src;
       st_src_reg coord;