Fix error inside Save layout dialog. Closes #123

ChangeLog.txt

@@ -42,7 +42,8 @@
 - Fix incorrect filename regular expressions.
 - Enabling Show Curve Details option causes constant redraw.
 - Fix regression with country flags.
-- [smart-pattern/valentina#121] Incorrect elliptical arc end angle
+- [smart-pattern/valentina#121] Incorrect elliptical arc end angle.
+- [smart-pattern/valentina#123] Error inside Save layout dialog.
 
 # Version 0.6.1 October 23, 2018
 - [#885] Regression. Broken support for multi size measurements.

src/app/valentina/dialogs/dialogsavelayout.cpp

@@ -545,7 +545,7 @@ void DialogSaveLayout::PathChanged(const QString &text)
 
     QDir dir(text);
     dir.setPath(text);
-    if (dir.exists(text))
+    if (not text.isEmpty() && dir.exists(text))
     {
         bOk->setEnabled(true);
         palette.setColor(ui->lineEditPath->foregroundRole(), Qt::black);