From 62fd7340070fefdc81a31b2212e53ec7145d16ea Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Thu, 22 Mar 2018 11:37:54 +0100
Subject: [PATCH] Footprint Viewer: do not try to preselect an empty footprint

Empty string is treated as an invalid LIB_ID, so it ends up with an
exception.
---
 pcbnew/footprint_viewer_frame.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pcbnew/footprint_viewer_frame.cpp b/pcbnew/footprint_viewer_frame.cpp
index 72dc717cc1..475b1a013b 100644
--- a/pcbnew/footprint_viewer_frame.cpp
+++ b/pcbnew/footprint_viewer_frame.cpp
@@ -624,9 +624,10 @@ void FOOTPRINT_VIEWER_FRAME::OnActivate( wxActivateEvent& event )
 
 bool FOOTPRINT_VIEWER_FRAME::ShowModal( wxString* aFootprint, wxWindow* aResultantFocusWindow )
 {
-    if( aFootprint )
+    if( aFootprint && !aFootprint->IsEmpty() )
     {
         LIB_ID fpid( *aFootprint );
+
         if( fpid.IsValid() )
         {
             setCurNickname( fpid.GetLibNickname() );