wined3d: Use wined3d_bit_scan() in set_glsl_shader_program().

dlls/wined3d/glsl_shader.c

@@ -10231,6 +10231,7 @@ static void set_glsl_shader_program(const struct wined3d_context_gl *context_gl,
     struct wined3d_shader *pshader = NULL;
     GLuint reorder_shader_id = 0;
     struct glsl_program_key key;
+    uint32_t attribs_map;
     GLuint program_id;
     unsigned int i;
     GLuint vs_id = 0;
@@ -10239,7 +10240,6 @@ static void set_glsl_shader_program(const struct wined3d_context_gl *context_gl,
     GLuint gs_id = 0;
     GLuint ps_id = 0;
     struct list *ps_list, *vs_list;
-    WORD attribs_map;
     struct wined3d_string_buffer *tmp_name;
 
     if (!(context_gl->c.shader_update_mask & (1u << WINED3D_SHADER_TYPE_VERTEX)) && ctx_data->glsl_program)
@@ -10417,11 +10417,9 @@ static void set_glsl_shader_program(const struct wined3d_context_gl *context_gl,
          * in order to make the bindings work, and it has to be done prior
          * to linking the GLSL program. */
         tmp_name = string_buffer_get(&priv->string_buffers);
-        for (i = 0; attribs_map; attribs_map >>= 1, ++i)
+        while (attribs_map)
         {
-            if (!(attribs_map & 1))
-                continue;
-
+            i = wined3d_bit_scan(&attribs_map);
             string_buffer_sprintf(tmp_name, "vs_in%u", i);
             GL_EXTCALL(glBindAttribLocation(program_id, i, tmp_name->buffer));
             if (vshader && vshader->reg_maps.shader_version.major >= 4)