media-sound/yoshimi: add binding := to fltk & fix build with 1.4

1.4.x seems to have dropped some transitive includes, and this needs
to include what it uses.

:= due to new soname

Have not tried wayland (new in fltk-1.4), but given the build fix
revealed that it uses some X-specific bits, odds are it'll be
broken without fltk[X(+)] and so added that as well.

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

media-sound/yoshimi/files/yoshimi-2.3.3.1-fltk1.4.patch

@@ -0,0 +1,15 @@
+MiscGui.cpp:1434:18: error: 'fl_display' was not declared ...
+
+Other files are using x.H, but that header is deprecated and
+the correct one is platform.H. fl_display is X-specific, so
+this likely cannot work without fltk[X] at the moment.
+--- a/UI/MiscGui.cpp
++++ b/UI/MiscGui.cpp
+@@ -28,6 +28,7 @@
+ 
+ #include <FL/Fl.H>
+ #include <FL/fl_draw.H>
++#include <FL/platform.H>
+ 
+ #include <cairo.h>
+ #include <cairo-xlib.h>

media-sound/yoshimi/yoshimi-2.3.3.1-r1.ebuild

@@ -27,13 +27,17 @@ DEPEND="
 	sys-libs/zlib
 	virtual/jack
 	x11-libs/cairo[X]
-	x11-libs/fltk:1[opengl]
+	x11-libs/fltk:1=[X(+),opengl]
 	lv2? ( media-libs/lv2 )
 "
 RDEPEND="${DEPEND}"
 
 DOCS=( ../Changelog ../README.txt )
 
+PATCHES=(
+	"${FILESDIR}"/${PN}-2.3.3.1-fltk1.4.patch
+)
+
 src_prepare() {
 	cmake_src_prepare
 	sed -e "/^install.*doc.*DATAROOTDIR/s/${PN}/${PF}/" -i CMakeLists.txt || die

media-sound/yoshimi/yoshimi-2.3.3.2-r1.ebuild

@@ -27,13 +27,17 @@ DEPEND="
 	sys-libs/zlib
 	virtual/jack
 	x11-libs/cairo[X]
-	x11-libs/fltk:1[opengl]
+	x11-libs/fltk:1=[X(+),opengl]
 	lv2? ( media-libs/lv2 )
 "
 RDEPEND="${DEPEND}"
 
 DOCS=( ../Changelog ../README.txt )
 
+PATCHES=(
+	"${FILESDIR}"/${PN}-2.3.3.1-fltk1.4.patch
+)
+
 src_prepare() {
 	cmake_src_prepare
 	sed -e "/^install.*doc.*DATAROOTDIR/s/${PN}/${PF}/" -i CMakeLists.txt || die