Cleanup: comment for depth picking code, const args

Note that setting `glDepthFunc` isn't important,
since 2.8 branch changes this value it might seem like an error
however it's harmless in this case - so better make note of this.

source/blender/editors/space_view3d/view3d_draw.c

@@ -861,7 +861,7 @@ static void draw_viewport_name(ARegion *ar, View3D *v3d, rcti *rect)
  * framenum, object name, bone name (if available), marker name (if available)
  */
 
-static void draw_selected_name(Scene *scene, Object *ob, rcti *rect)
+static void draw_selected_name(Scene *scene, Object *ob, const rcti *rect)
 {
 	const int cfra = CFRA;
 	const char *msg_pin = " (Pinned)";

source/blender/editors/space_view3d/view3d_select.c

@@ -1114,7 +1114,7 @@ static Base *object_mouse_select_menu(
 	}
 }
 
-static bool selectbuffer_has_bones(const unsigned int *buffer, const unsigned int hits)
+static bool selectbuffer_has_bones(const uint *buffer, const uint hits)
 {
 	unsigned int i;
 	for (i = 0; i < hits; i++) {
@@ -1235,8 +1235,9 @@ finally:
 }
 
 /* returns basact */
-static Base *mouse_select_eval_buffer(ViewContext *vc, unsigned int *buffer, int hits,
-                                      Base *startbase, bool has_bones, bool do_nearest)
+static Base *mouse_select_eval_buffer(
+        ViewContext *vc, const uint *buffer, int hits,
+        Base *startbase, bool has_bones, bool do_nearest)
 {
 	Scene *scene = vc->scene;
 	View3D *v3d = vc->v3d;

source/blender/gpu/intern/gpu_select_pick.c

@@ -326,6 +326,9 @@ void gpu_select_pick_begin(
 		glDepthMask(GL_TRUE);
 
 		if (mode == GPU_SELECT_PICK_ALL) {
+			/* Note that other depth settings (such as #GL_LEQUAL) work too,
+			 * since the depth is always cleared.
+			 * Noting this for cases when depth picking is used where drawing calls change depth settings. */
 			glDepthFunc(GL_ALWAYS);
 		}
 		else {