Fix T78045: CTL-ALT-S does nothing in pose mode and crashes when called from the menu

source/blender/editors/transform/transform_mode.h

@@ -26,6 +26,7 @@
 #define __TRANSFORM_MODE_H__
 
 struct AnimData;
+struct bContext;
 struct LinkNode;
 struct TransData;
 struct TransDataContainer;
@@ -40,6 +41,7 @@ typedef struct TransDataGenericSlideVert {
 } TransDataGenericSlideVert;
 
 /* transform_mode.c */
+int transform_mode_really_used(struct bContext *C, int mode);
 bool transdata_check_local_center(TransInfo *t, short around);
 bool transform_mode_is_changeable(const int mode);
 void protectedTransBits(short protectflag, float vec[3]);