kconfig: replace KERNELVERSION usage by the mainmenu's prompt

Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index fe18f7e..06dd2e3 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1274,8 +1274,8 @@
 	char title[256];
 
 	QDesktopWidget *d = configApp->desktop();
-	snprintf(title, sizeof(title), _("Linux Kernel v%s Configuration%s"),
-		getenv("KERNELVERSION"),
+	snprintf(title, sizeof(title), "%s%s",
+		rootmenu.prompt->text,
 #if QT_VERSION < 0x040000
 		" (Qt3)"
 #else