gnu: VLC: Fix build with Qt 5.15.

* gnu/packages/patches/vlc-qt-5.15.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/video.scm (vlc)[source]: Use it.

gnu/local.mk

@@ -1699,6 +1699,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/vboot-utils-fix-tests-show-contents.patch	\
   %D%/packages/patches/vboot-utils-skip-test-workbuf.patch	\
   %D%/packages/patches/vcflib-use-shared-libraries.patch	\
+  %D%/packages/patches/vlc-qt-5.15.patch			\
   %D%/packages/patches/vigra-python-compat.patch		\
   %D%/packages/patches/vinagre-newer-freerdp.patch             \
   %D%/packages/patches/vinagre-newer-rdp-parameters.patch      \

gnu/packages/patches/vlc-qt-5.15.patch

@@ -0,0 +1,56 @@
+Fix build of VLC with Qt 5.15. Otherwise it fails like this:
+
+------
+In file included from gui/qt/util/timetooltip.moc.cpp:10:0:
+gui/qt/util/timetooltip.hpp:49:18: error: field ‘mPainterPath’ has incomplete type ‘QPainterPath’
+     QPainterPath mPainterPath;
+                  ^~~~~~~~~~~~
+In file included from /gnu/store/jsxxnsdvij5mrrv6c0kj0261k0f44xlz-qtbase-5.15.2/include/qt5/QtGui/qbrush.h:49:0,
+                 from /gnu/store/jsxxnsdvij5mrrv6c0kj0261k0f44xlz-qtbase-5.15.2/include/qt5/QtGui/qpalette.h:46,
+                 from /gnu/store/jsxxnsdvij5mrrv6c0kj0261k0f44xlz-qtbase-5.15.2/include/qt5/QtWidgets/qwidget.h:48,
+                 from /gnu/store/jsxxnsdvij5mrrv6c0kj0261k0f44xlz-qtbase-5.15.2/include/qt5/QtWidgets/QWidget:1,
+                 from gui/qt/util/timetooltip.hpp:27,
+                 from gui/qt/util/timetooltip.moc.cpp:10:
+/gnu/store/jsxxnsdvij5mrrv6c0kj0261k0f44xlz-qtbase-5.15.2/include/qt5/QtGui/qmatrix.h:54:7: note: forward declaration of ‘class QPainterPath’
+ class QPainterPath;
+       ^~~~~~~~~~~~
+make[4]: *** [Makefile:25852: gui/qt/util/libqt_plugin_la-timetooltip.moc.lo] Error 1
+------
+
+diff --git a/modules/gui/qt/components/playlist/views.cpp b/modules/gui/qt/components/playlist/views.cpp
+index 24db9d9..73c1779 100644
+--- a/modules/gui/qt/components/playlist/views.cpp
++++ b/modules/gui/qt/components/playlist/views.cpp
+@@ -27,6 +27,7 @@
+ #include "input_manager.hpp"                      /* THEMIM */
+ 
+ #include <QPainter>
++#include <QPainterPath>
+ #include <QRect>
+ #include <QStyleOptionViewItem>
+ #include <QFontMetrics>
+diff --git a/modules/gui/qt/dialogs/plugins.cpp b/modules/gui/qt/dialogs/plugins.cpp
+index d233382..69728eb 100644
+--- a/modules/gui/qt/dialogs/plugins.cpp
++++ b/modules/gui/qt/dialogs/plugins.cpp
+@@ -53,6 +53,7 @@
+ #include <QListView>
+ #include <QListWidget>
+ #include <QPainter>
++#include <QPainterPath>
+ #include <QStyleOptionViewItem>
+ #include <QKeyEvent>
+ #include <QPushButton>
+diff --git a/modules/gui/qt/util/timetooltip.hpp b/modules/gui/qt/util/timetooltip.hpp
+index 6a1329e..9f50b18 100644
+--- a/modules/gui/qt/util/timetooltip.hpp
++++ b/modules/gui/qt/util/timetooltip.hpp
+@@ -25,6 +25,7 @@
+ #include "qt.hpp"
+ 
+ #include <QWidget>
++#include <QPainterPath>
+ 
+ class TimeTooltip : public QWidget
+ {
+

gnu/packages/video.scm

@@ -1772,6 +1772,7 @@ videoformats depend on the configuration flags of ffmpeg.")
                     "https://download.videolan.org/pub/videolan/vlc/"
                     (car (string-split version #\-))
                     "/vlc-" version ".tar.xz"))
+              (patches (search-patches "vlc-qt-5.15.patch"))
               (sha256
                (base32
                 "1f46h0hv7fk35zg4iczlp7ib7h2jmh8m4r5klw3g2558ib9134qq"))))