Cleanup: Use const parameters for active button lookups/tests

Needed for const-correctness in the following commit.

2 files changed, 4 insertions, 4 deletions

diff --git a/source/blender/editors/include/UI_interface.h b/source/blender/editors/include/UI_interface.h
index f3c94fb7a28..dd5c92e5e0f 100644
--- a/source/blender/editors/include/UI_interface.h
+++ b/source/blender/editors/include/UI_interface.h
@@ -2480,7 +2480,7 @@ void UI_context_active_but_prop_get_templateID(struct bContext *C,
                                                struct PropertyRNA **r_prop);
 struct ID *UI_context_active_but_get_tab_ID(struct bContext *C);
 
-uiBut *UI_region_active_but_get(struct ARegion *region);
+uiBut *UI_region_active_but_get(const struct ARegion *region);
 uiBut *UI_region_but_find_rect_over(const struct ARegion *region, const struct rcti *rect_px);
 uiBlock *UI_region_block_find_mouse_over(const struct ARegion *region,
                                          const int xy[2],
diff --git a/source/blender/editors/interface/interface_handlers.c b/source/blender/editors/interface/interface_handlers.c
index 377e55e7299..abb9d0dcc13 100644
--- a/source/blender/editors/interface/interface_handlers.c
+++ b/source/blender/editors/interface/interface_handlers.c
@@ -8317,7 +8317,7 @@ void ui_but_active_free(const bContext *C, uiBut *but)
 }
 
 /* returns the active button with an optional checking function */
-static uiBut *ui_context_button_active(ARegion *region, bool (*but_check_cb)(uiBut *))
+static uiBut *ui_context_button_active(const ARegion *region, bool (*but_check_cb)(const uiBut *))
 {
   uiBut *but_found = NULL;
 
@@ -8358,7 +8358,7 @@ static uiBut *ui_context_button_active(ARegion *region, bool (*but_check_cb)(uiB
   return but_found;
 }
 
-static bool ui_context_rna_button_active_test(uiBut *but)
+static bool ui_context_rna_button_active_test(const uiBut *but)
 {
   return (but->rnapoin.data != NULL);
 }
@@ -8383,7 +8383,7 @@ uiBut *UI_context_active_but_get_respect_menu(const bContext *C)
   return ui_context_button_active(region_menu ? region_menu : CTX_wm_region(C), NULL);
 }
 
-uiBut *UI_region_active_but_get(ARegion *region)
+uiBut *UI_region_active_but_get(const ARegion *region)
 {
   return ui_context_button_active(region, NULL);
 }