Fix error when reading newlines

Fix error 'operation priorities' identified by static analysis from
http://www.viva64.com/en/b/0251/

'!=' operator's priority is higher than that of the '='

Change-Id: I2668171acb506992e3a15b113682ac04ba309532
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/io/qsettings.cpp

@@ -1752,7 +1752,7 @@ bool QConfFileSettingsPrivate::readIniLine(const QByteArray &data, int &dataPos,
 
             if (i == lineStart + 1) {
                 char ch;
-                while (i < dataLen && ((ch = data.at(i) != '\n') && ch != '\r'))
+                while (i < dataLen && (((ch = data.at(i)) != '\n') && ch != '\r'))
                     ++i;
                 lineStart = i;
             } else if (!inQuotes) {