Properly define dispatchExceptionAtReset to fix compiler warnings

Xprint/Init.c

@@ -300,8 +300,6 @@ static Bool xprintInitGlobalsCalled = FALSE;
  */
 void PrinterInitGlobals(void)
 {
-    extern char dispatchExceptionAtReset; /* defined in Xserver/dix/dispatch.c */
-
     xprintInitGlobalsCalled = TRUE;
 
 #ifdef DAMAGE

include/dix.h

@@ -294,6 +294,7 @@ extern ClientPtr requestingClient;
 extern ClientPtr *clients;
 extern ClientPtr serverClient;
 extern int currentMaxClients;
+extern char dispatchExceptionAtReset;
 
 typedef int HWEventQueueType;
 typedef HWEventQueueType* HWEventQueuePtr;

os/utils.c

@@ -287,8 +287,6 @@ int userdefinedfontpath = 0;
 
 char *dev_tty_from_init = NULL;		/* since we need to parse it anyway */
 
-extern char dispatchExceptionAtReset;
-
 /* Extension enable/disable in miinitext.c */
 extern Bool EnableDisableExtension(char *name, Bool enable);
 extern void EnableDisableExtensionError(char *name, Bool enable);