Add upstream patch for avoiding destruction of TLWs that were never created

Fixes assert during Filezilla startup (#1484955)

wxGTK3-3.0.3-avoid-tlw-destroy-assert.patch

@@ -0,0 +1,29 @@
+From ce1dce113c5eda42f49ba3278bb21c61872ca37d Mon Sep 17 00:00:00 2001
+From: Paul Cornett <paulcor@users.noreply.github.com>
+Date: Mon, 28 Aug 2017 20:31:47 -0700
+Subject: [PATCH] Avoid delayed destruction if TLW was never created. See
+ #17942
+
+(cherry picked from commit 4a71ba820f085a3d5a7233e9fd0e23ae4e45af58)
+---
+ src/common/toplvcmn.cpp | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/common/toplvcmn.cpp b/src/common/toplvcmn.cpp
+index ef693690c5d..6a722f8be48 100644
+--- a/src/common/toplvcmn.cpp
++++ b/src/common/toplvcmn.cpp
+@@ -105,10 +105,10 @@ bool wxTopLevelWindowBase::Destroy()
+     // as we will be deleted anyhow during its destruction and the pointer
+     // stored in wxPendingDelete would become invalid, so just delete ourselves
+     // immediately in this case.
+-    if ( wxWindow* parent = GetParent() )
++    wxWindow* parent = GetParent();
++    if ( (parent && parent->IsBeingDeleted()) || !GetHandle() )
+     {
+-        if ( parent->IsBeingDeleted() )
+-            return wxNonOwnedWindow::Destroy();
++        return wxNonOwnedWindow::Destroy();
+     }
+ 
+     // delayed destruction: the frame will be deleted during the next idle

wxGTK3.spec

@@ -20,7 +20,7 @@
 
 Name:           %{wxgtkname}
 Version:        3.0.3
-Release:        4%{?snapshottag}%{?dist}
+Release:        5%{?snapshottag}%{?dist}
 Summary:        GTK port of the wxWidgets GUI library
 License:        wxWidgets
 Group:          System Environment/Libraries
@@ -43,6 +43,8 @@ Patch0:         %{name}-%{version}-abicheck.patch
 %if 0%{?fedora} > 25
 Patch1:         %{name}-%{version}-webkit2.patch
 %endif
+# https://github.com/wxWidgets/wxWidgets/commit/ce1dce113c5eda42f49ba3278bb21c61872ca37d
+Patch2:         %{name}-%{version}-avoid-tlw-destroy-assert.patch
 
 BuildRequires:  gtk%{gtkver}-devel
 #Note webkitgtk (GTK2) does not appear to be supported
@@ -376,6 +378,10 @@ fi
 %doc docs/doxygen/out/xml/*
 
 %changelog
+* Wed Aug 30 2017 Scott Talbert <swt@techie.net> - 3.0.3-5
+- Add upstream patch for avoiding destruction of TLWs that were never created
+- Fixes assert during Filezilla startup (#1484955)
+
 * Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 3.0.3-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild