Fix GCC build I accedentally broken by my previous commit

src/jrd/isc.h

@@ -267,20 +267,6 @@ struct ipccfg
 
 typedef ipccfg *IPCCFG;
 
-/* AST actions taken by SCH_ast() */
-
-enum ast_t
-{
-	AST_alloc,
-	AST_init,
-	AST_fini,
-	AST_check,
-	AST_disable,
-	AST_enable,
-	AST_enter,
-	AST_exit
-};
-
 /* AST thread scheduling macros */
 
 #ifdef AST_THREAD

src/jrd/sch_proto.h

@@ -28,6 +28,20 @@
 
 extern "C" {
 
+/* AST actions taken by SCH_ast() */
+
+enum ast_t
+{
+	AST_alloc,
+	AST_init,
+	AST_fini,
+	AST_check,
+	AST_disable,
+	AST_enable,
+	AST_enter,
+	AST_exit
+};
+
 int		API_ROUTINE gds__thread_enable(int);
 void	API_ROUTINE gds__thread_enter(void);
 void	API_ROUTINE gds__thread_exit(void);