patch 8.2.4126: crash on exit when built with dynamic Tcl

Problem:    Crash on exit when built with dynamic Tcl and EXITFREE is defined.
            (Dominique Pellé)
Solution:   Only call Tcl_Finalize() when initialized. (closes #9546)

src/if_tcl.c

@@ -248,14 +248,6 @@ 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;
@@ -285,6 +277,17 @@ tcl_enabled(int verbose)
     }
     return stubs_initialized;
 }
+#endif
+
+#if defined(EXITFREE) || defined(PROTO)
+    void
+vim_tcl_finalize(void)
+{
+# ifdef DYNAMIC_TCL
+    if (stubs_initialized)
+# endif
+	Tcl_Finalize();
+}
 #endif
 
     void

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4126,
 /**/
     4125,
 /**/