shared: qssquery: checkParanthesis(): Ignore paranthesis in quotes

Fixes #12

shared/qssquery.cpp

@@ -33,7 +33,11 @@ bool QSSQuery::checkParanthesis(QString expression)
 	QStack<QChar> open;
 	QStack<QChar> close;
 
+	bool inQuotes = false;
+
 	for(QChar &c : expression)
+	{
+		if(!inQuotes)
 		{
 			if(c == '(')
 			{
@@ -44,6 +48,11 @@ bool QSSQuery::checkParanthesis(QString expression)
 				close.push(c);
 			}
 		}
+		if(c == '"')
+		{
+			inQuotes = !inQuotes;
+		}
+	}
 	if(open.size() != close.size())
 	{
 		return false;