Fix configure --enable-cairo --enable-cairoext.

Add #include <config.h>. See report in fltk.general:

https://groups.google.com/forum/#!topic/fltkgeneral/x80qQ6wt0s4



git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@12329 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

CHANGES

@@ -1,11 +1,18 @@
+
+CHANGES IN FLTK 1.3.5					RELEASED: ??? ?? 2017
+
 Bug fixes and other improvements
 
+	- Fix configure --enable-cairo --enable-cairoext,
+	  see report in fltk.general:
+	  https://groups.google.com/forum/#!topic/fltkgeneral/x80qQ6wt0s4
 	- Fix for MacOS timer implementation (STR #3387).
 	- Fix for drop-to-FLTK-widget under MSWindows when the desktop is
 	  rescaled (STR #3390).
 	- Added support for MacOS 10.13 "High Sierra". Subwindows don't
 	  move correctly under 10.13 without this fix.
 
+
 CHANGES IN FLTK 1.3.4-1					RELEASED: Nov 15 2016
 
 Bug fixes and other improvements
@@ -60,7 +67,7 @@ CHANGES IN FLTK 1.3.4rc1				RELEASED: Oct 17 2016
 	- Added full support of true subwindows to the Mac OS X platform.
 	  Window nesting to any depth is possible. An Fl_Gl_Window window or
 	  subwindow can contain Fl_Window's as subwindows.
-	- Fluid now supports external editors (STR#3213)
+	- Fluid now supports external editors (STR #3213)
 	  See: Edit -> GUI Settings -> Use external editor
 	- Added method Fl_Widget::is_label_copied().
 	- Added methods Fl_Copy_Surface::w(), Fl_Copy_Surface::h(),

src/Fl_Window_shape.cxx

@@ -16,6 +16,7 @@
 //     http://www.fltk.org/str.php
 //
 
+#include <config.h>
 #include <FL/Fl.H>
 #include <FL/fl_draw.H>
 #include <FL/x.H>