Update to tk 8.5.19

generic/tkDecls.h

@@ -25,6 +25,10 @@
 
 /* !BEGIN!: Do not edit below this line. */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Exported function declarations:
  */
@@ -1970,10 +1974,8 @@ typedef struct TkStubs {
     void (*tkUnusedStubEntry) (void); /* 275 */
 } TkStubs;
 
-#ifdef __cplusplus
-extern "C" {
-#endif
 extern TkStubs *tkStubsPtr;
+
 #ifdef __cplusplus
 }
 #endif