Use qsizetype in QList

The change creates a slight source incompatibility. The main
things to take care of are

* code using printf statements on list.size(). Using qsizetype in
printf statements will always require a cast to work on both 32
and 64 bit.
* A few places where overloads now get ambiguous. One example is
QRandomGenerator::bounded() that has overloads for int, uint and
double, but not int64.
* Streaming list.size() to a QDataStream will change the format
depending on the architecture.

[ChangeLog][QtCore][QList] QList now uses qsizetype to index into
elements.

Change-Id: Iaff562a4d072b97f458417b670f95971bd47cbc6
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/corelib/serialization/qjsonobject.cpp b/src/corelib/serialization/qjsonobject.cpp
index bf2bdb957d..e573485226 100644
--- a/src/corelib/serialization/qjsonobject.cpp
+++ b/src/corelib/serialization/qjsonobject.cpp
@@ -718,7 +718,7 @@ bool QJsonObject::operator!=(const QJsonObject &other) const
 QJsonObject::iterator QJsonObject::erase(QJsonObject::iterator it)
 {
     if (it.o != this || it.i < 0 || it.i >= o->elements.length())
-        return {this, o->elements.length()};
+        return {this, int(o->elements.length())};
 
     int index = it.i;