nir/lower_fragcolor: Handle fp16 outputs

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10391>

src/compiler/nir/nir_lower_fragcolor.c

@@ -86,8 +86,7 @@ lower_fragcolor_instr(nir_builder *b, nir_instr *intr, UNUSED void *data)
       char name[28];
       snprintf(name, sizeof(name), name_tmpl, i);
       nir_variable *out_color = nir_variable_create(b->shader, nir_var_shader_out,
-                                                   glsl_vec4_type(),
-                                                   name);
+                                                   out->type, name);
       out_color->data.location = FRAG_RESULT_DATA0 + i;
       out_color->data.driver_location = i;
       out_color->data.index = out->data.index;