libraries/libqxt: Patch for gcc >= 6.x.

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

libraries/libqxt/libqxt-gcc6.patch

@@ -0,0 +1,11 @@
+--- a/src/core/qxtslotjob.cpp	2011-11-24 16:10:32.000000000 -0600
++++ b/src/core/qxtslotjob.cpp	2016-03-07 16:20:32.758268253 -0600
+@@ -174,7 +174,7 @@ This uses QxtSignalWaiter so it will _no
+ 
+ QVariant QxtFuture::delayedResult(int msec)
+ {
+-    if (!waiter->wait(msec, false))
++    if (!waiter->wait(msec, NULL))
+         return QVariant();
+     return job->result();
+ }

libraries/libqxt/libqxt.SlackBuild

@@ -74,6 +74,9 @@ find -L . \
 # Fix linking during the xrandr test
 sed -i "s|lXrandr$|lXrandr -lX11|" config.tests/xrandr/xrandr.pro
 
+# Thanks to Archlinux for this
+patch -p1 < $CWD/libqxt-gcc6.patch
+
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure -prefix /usr -libdir /usr/lib$LIBDIRSUFFIX