Update Irrlicht from SVN trunk r6731 to r6738, with Bridge Command customisations applied. (#89)

Author: bridgecommand

bin/Irrlicht.dll

@@ -1,7 +1,7 @@
 Notes on Irrlicht as used in Bridge Command
 ===========================================
 
-Irrlicht updated to r6731 from SVN trunk
+Irrlicht updated to r6738 from SVN trunk
 
 The following changes are applied for Bridge Command from 
 Irrlicht trunk, and all changes marked in source with //JAMES:

bin/Irrlicht_VS.dll

@@ -456,6 +456,8 @@ Changes in 1.9 (not yet released)
 
 --------------------------
 Changes in 1.8.6
+- Update libpng to 1.6.54 (from 1.6.37)
+- Avoid compile warnings with newer compilers like gcc 14
 - Fix CGUIPanel (in Gui Editor) so horizontal scrollbar can get focus (Feature request #163). Thanks @yybbwc for reporting.
 - CXMeshFileLoader: fix buffer overreads with text format. Thanks @sfan5 for report and patch.
   Patch (commit 6f4f7c4 to Minetest): https://github.com/minetest/irrlicht/commit/6f4f7c4d75c9d563e98d3936ed8bc6e248dc14a8