gnuplot: enable Qt terminal and set default to wxt * src/gnuplot.mk: Depend on qt5 and build with QT=1 QT_DIR=$(HOST_PREFIX)/qt QT_BIN_DIR=(BUILD_TOOLS_PREFIX)/bin, install gnuplot_qt.exe * src/gnuplot-1-fixes.patch: add to patchto allow override of QT tools and paths * installer-files/octave-firsttime.vbs: set GNUTERM=wxt * installer-files/octave.vbs: set GNUTERM=wxt * installer-files/octave.bat: set GNUTERM=wxt * installer-files/cmdshell.bat: set GNUTERM=wxt

# This file is part of MXE.
# See index.html for further information.

This patch has been taken from:
http://bugs.gentoo.org/show_bug.cgi?id=305101
http://repos.archlinux.org/wsvn/packages/gd/trunk/libpng14.patch

--- a/gd_png.c
+++ b/gd_png.c
@@ -149,7 +149,7 @@
 	return NULL;
   }
 
-	if (!png_check_sig (sig, 8)) { /* bad signature */
+	if (png_sig_cmp (sig, 0, 8)) { /* bad signature */
     	return NULL;		/* bad signature */
 	}