Initialize mDownloadFonts to fix an UMR. b=413255 r+sr=roc a=blocking1.9

widget/src/xpwidgets/nsPrintSettingsImpl.cpp

@@ -59,7 +59,7 @@ nsPrintSettings::nsPrintSettings() :
   mHowToEnableFrameUI(kFrameEnableNone),
   mIsCancelled(PR_FALSE),
   mPrintSilent(PR_FALSE),
-	mPrintPreview(PR_FALSE),
+  mPrintPreview(PR_FALSE),
   mShrinkToFit(PR_TRUE),
   mShowPrintProgress(PR_TRUE),
   mPrintPageDelay(500),
@@ -71,6 +71,7 @@ nsPrintSettings::nsPrintSettings() :
   mPrintReversed(PR_FALSE),
   mPrintInColor(PR_TRUE),
   mOrientation(kPortraitOrientation),
+  mDownloadFonts(PR_FALSE),
   mNumCopies(1),
   mPrintToFile(PR_FALSE),
   mOutputFormat(kOutputFormatNative),