msi: add support for MSIRUNMODE_REBOOTNOW in MsiGetMode

[Austin English]

Keeping Focht happy, http://bugs.winehq.org/show_bug.cgi?id=30312

-- 
-Austin
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diff --git a/dlls/msi/install.c b/dlls/msi/install.c
index 83b8b7d..b414e08 100644
--- a/dlls/msi/install.c
+++ b/dlls/msi/install.c
@@ -764,6 +764,10 @@ BOOL WINAPI MsiGetMode(MSIHANDLE hInstall, MSIRUNMODE iRunMode)
         r = package->need_reboot;
         break;
 
+    case MSIRUNMODE_REBOOTNOW:
+        r = package->need_reboot;
+        break;
+
     case MSIRUNMODE_LOGENABLED:
         r = (package->log_file != INVALID_HANDLE_VALUE);
         break;