Cleanup: Use const parameters for active button lookups/tests

Needed for const-correctness in the following commit.

1 files changed, 3 insertions, 3 deletions

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);
 }