patch 8.2.3740: memory left allocated on exit when using Tcl

Problem:    Memory left allocated on exit when using Tcl.
Solution:   Call Tcl_Finalize().

src/alloc.c

@@ -573,6 +573,9 @@ free_all_mem(void)
 # endif
 # ifdef FEAT_GUI_GTK
     gui_mch_free_all();
+# endif
+# ifdef FEAT_TCL
+    vim_tcl_finalize();
 # endif
     clear_hl_tables();
 

src/if_tcl.c

@@ -248,6 +248,14 @@ vim_tcl_init(char *arg)
 #endif
 }
 
+#if defined(EXITFREE) || defined(PROTO)
+    void
+vim_tcl_finalize(void)
+{
+    Tcl_Finalize();
+}
+#endif
+
 #if defined(DYNAMIC_TCL) || defined(PROTO)
 
 static int stubs_initialized = FALSE;

src/proto/if_tcl.pro

@@ -1,5 +1,6 @@
 /* if_tcl.c */
 void vim_tcl_init(char *arg);
+void vim_tcl_finalize(void);
 int tcl_enabled(int verbose);
 void tcl_end(void);
 void ex_tcl(exarg_T *eap);

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3740,
 /**/
     3739,
 /**/