made the Reboot command first quit and then reboot

- fixed bug #989690
 - the installer now denies reboots while running
 - the Reboot instruction no longer returns or sets the error flag
 - added .onRebootFailed which is called when Reboot fails
 - installer should now always clean-up when rebooting


git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@3729 212acab6-be3b-0410-9dea-997c60f758d6

Source/build.cpp

@@ -1537,10 +1537,13 @@ int CEXEBuild::resolve_coderefs(const char *str)
       {"%s.onGUIInit", &cur_header->code_onGUIInit},
       {"%s.onGUIEnd", &cur_header->code_onGUIEnd},
       {"%s.onMouseOverSection", &cur_header->code_onMouseOverSection},
-#endif
+#endif//NSIS_CONFIG_ENHANCEDUI_SUPPORT
 #ifdef NSIS_CONFIG_COMPONENTPAGE
       {"%s.onSelChange", &cur_header->code_onSelChange},
-#endif
+#endif//NSIS_CONFIG_COMPONENTPAGE
+#ifdef NSIS_SUPPORT_REBOOT
+      {"%s.onRebootFailed", &cur_header->code_onRebootFailed},
+#endif//NSIS_SUPPORT_REBOOT
       {0, 0}
     };