inkscape: fix build

srcpkgs/inkscape/template

@@ -1,7 +1,7 @@
 # Template file for 'inkscape'.
 pkgname=inkscape
 version=0.91
-revision=15
+revision=16
 build_style=gnu-configure
 configure_args="--enable-lcms --enable-poppler-cairo
  --without-gnome-vfs --disable-static"
@@ -19,3 +19,8 @@ distfiles="https://inkscape.global.ssl.fastly.net/media/resources/file/${pkgname
 checksum=4d901f8a9e1924404e797ad23b8b0c495a9d155448816d95a55974314e1f141b
 
 CXXFLAGS="-std=c++11"
+
+pre_configure() {
+	sed -i src/ui/clipboard.cpp \
+		-e 's;ScopedPtr<char>;make_unique_ptr_gfree;'
+}