Add patch for wxPython 2.9.4.0 that fixes an issue with recent clang …

…versions.

README.md

@@ -171,6 +171,10 @@ Assuming you have virtualenv at *~/.virtualenvs/Cura/* and [wxPython sources](ht
 2. `make install`
     Note to speedup the process I recommend you to enable multicore build by adding the -j*cores* flag:
     `make -j4 install`
+
+    Chances are high that compilation will fail with type mismatch error in Obj-C code. If it's the case then apply a patch at *scripts/darwin/wxPython-src-2.9.4.0.patch*.
+    If it won't fix all the errors, just modify source files manually by casting types to those expected by clang.
+
 3. `cd` into *~/Downloads/wxPython-src-2.9.4.0/wxPython/*
 4. Build wxPython (Note `python` is the python of your virtualenv):
 

scripts/darwin/wxPython-src-2.9.4.0.patch

@@ -0,0 +1,20 @@
+--- /Users/kentzo/Downloads/wxPython-src-2.9.4.0 2/src/osx/webview_webkit.mm	2012-07-20 22:19:02.000000000 -0500
++++ /Users/kentzo/Downloads/wxPython-src-2.9.4.0/src/osx/webview_webkit.mm	2015-05-30 00:45:13.000000000 -0500
+@@ -924,7 +924,7 @@
+ wxVector<wxSharedPtr<wxWebViewHistoryItem> > wxWebViewWebKit::GetBackwardHistory()
+ {
+     wxVector<wxSharedPtr<wxWebViewHistoryItem> > backhist;
+-    WebBackForwardList* history = [m_webView backForwardList];
++    WebBackForwardList* history = (WebBackForwardList *)[m_webView backForwardList];
+     int count = [history backListCount];
+     for(int i = -count; i < 0; i++)
+     {
+@@ -942,7 +942,7 @@
+ wxVector<wxSharedPtr<wxWebViewHistoryItem> > wxWebViewWebKit::GetForwardHistory()
+ {
+     wxVector<wxSharedPtr<wxWebViewHistoryItem> > forwardhist;
+-    WebBackForwardList* history = [m_webView backForwardList];
++    WebBackForwardList* history = (WebBackForwardList *)[m_webView backForwardList];
+     int count = [history forwardListCount];
+     for(int i = 1; i <= count; i++)
+     {