i18nutil: fix invalid string copy that prevents startup

(regression from ef513fd4)

Change-Id: Ia3ba5ba853648a4b180d6cc2318a4780fc87bf4d

i18nutil/source/utility/paper.cxx

@@ -271,9 +271,10 @@ PaperInfo PaperInfo::getSystemDefaultPaper()
 
                 if (ePaper == PAPER_USER)
                 {
-                    bHalve = !aPaper.startsWith("half");
-                    if (bHalve)
+                    if (aPaper.startsWith("half"))
+                    {
                         aPaper = aPaper.copy(4);
+                    }
                     ePaper = PaperInfo::fromPSName(aPaper);
                 }