Fix cast-function-type gcc 8 warning

Gcc 8 now warns against casting functions taking references to
functions taking pointers:

warning: cast between incompatible function types from ‘QVariant (*)(const int&, const int&, double)’ to
‘QVariant (*)(const void*, const void*, double)’ [-Werror=cast-function-type]

Suppressed by casting over void(*)().

Change-Id: I48bee53253b8e87110e8a49efa761fc2add89c5a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/src/corelib/animation/qvariantanimation.cpp b/src/corelib/animation/qvariantanimation.cpp
index 7117092c54..75b8a3fbbf 100644
--- a/src/corelib/animation/qvariantanimation.cpp
+++ b/src/corelib/animation/qvariantanimation.cpp
@@ -448,7 +448,7 @@ void QVariantAnimation::registerInterpolator(QVariantAnimation::Interpolator fun
 
 template<typename T> static inline QVariantAnimation::Interpolator castToInterpolator(QVariant (*func)(const T &from, const T &to, qreal progress))
 {
-     return reinterpret_cast<QVariantAnimation::Interpolator>(func);
+     return reinterpret_cast<QVariantAnimation::Interpolator>(reinterpret_cast<void(*)()>(func));
 }
 
 QVariantAnimation::Interpolator QVariantAnimationPrivate::getInterpolator(int interpolationType)
diff --git a/src/corelib/animation/qvariantanimation.h b/src/corelib/animation/qvariantanimation.h
index f21832b256..0d007487b9 100644
--- a/src/corelib/animation/qvariantanimation.h
+++ b/src/corelib/animation/qvariantanimation.h
@@ -113,7 +113,7 @@ private:
 
 template <typename T>
 void qRegisterAnimationInterpolator(QVariant (*func)(const T &from, const T &to, qreal progress)) {
-    QVariantAnimation::registerInterpolator(reinterpret_cast<QVariantAnimation::Interpolator>(func), qMetaTypeId<T>());
+    QVariantAnimation::registerInterpolator(reinterpret_cast<QVariantAnimation::Interpolator>(reinterpret_cast<void(*)()>(func)), qMetaTypeId<T>());
 }
 
 #endif //QT_NO_ANIMATION