Add <cstdint> header to avoid compilation errors on GCC 13

[mairacanal]

Currently, when compiling with GCC 13, the following error is displayed:

In file included from /builddir/build/BUILD/touchegg-2.0.15/src/actions/action.h:26,
                 from /builddir/build/BUILD/touchegg-2.0.15/src/actions/action.cpp:18:
/builddir/build/BUILD/touchegg-2.0.15/src/gesture/gesture.h:32:58: error: 'uint64_t' has not been declared
    32  |          int fingers, DeviceType performedOnDeviceType, uint64_t elapsedTime)
        |                                                         ^~~~~~~~

/builddir/build/BUILD/touchegg-2.0.15/src/gesture/gesture.h:72:3: error: 'uint64_t' does not name a type
    72  |   uint64_t elapsedTime() const { return this->gestureElapsedTime; }
        |   ^~~~~~~~

/builddir/build/BUILD/touchegg-2.0.15/src/gesture/gesture.h:22:1: note: 'uint64_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
    21  | #include "gesture/device-type.h"
    +++ |+#include <cstdint>
    22  | #include "gesture/gesture-direction.h"

/builddir/build/BUILD/touchegg-2.0.15/src/gesture/gesture.h:88:3: error: 'uint64_t' does not name a type
    88  |   uint64_t gestureElapsedTime = -1;
        |   ^~~~~~~~

/builddir/build/BUILD/touchegg-2.0.15/src/gesture/gesture.h:88:3: note: 'uint64_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?

/builddir/build/BUILD/touchegg-2.0.15/src/gesture/gesture.h: In constructor 'Gesture::Gesture(GestureType, GestureDirection, double, int, DeviceType, int)':

/builddir/build/BUILD/touchegg-2.0.15/src/gesture/gesture.h:38:9: error: class 'Gesture' does not have any field named 'gestureElapsedTime'
    38  |   gestureElapsedTime(elapsedTime) {}
        |   ^~~~~~~~~~~~~~~~~~

I'm the current maintainer of the Fedora package, which is not currently building due to this error [1].

[1] https://koschei.fedoraproject.org/package/touchegg?collection=f38

[JoseExposito]

Hi Maíra,

Thanks a lot for maintaining the Fedora packages and for sending the fix upstream.

I can tag a new release if that makes your life easier.

[mairacanal]

Creating a new release would be great! This way I wouldn't have to create a patch downstream. Thanks for the help!

[JoseExposito]

Cool, I just released v2.0.16 fixing the GCC 13 issue: https://github.com/JoseExposito/touchegg/releases/tag/2.0.16

Thanks a lot!!