QVarLengthArray: Avoid int vs. size_t warnings in operator=

Change-Id: I879b62c55e4211d3e4e1a18f6699f26e3f5de1f8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/tools/qvarlengtharray.h

@@ -99,7 +99,7 @@ public:
 #ifdef Q_COMPILER_INITIALIZER_LISTS
     QVarLengthArray<T, Prealloc> &operator=(std::initializer_list<T> list)
     {
-        resize(list.size());
+        resize(int(list.size())); // ### q6sizetype
         std::copy(list.begin(), list.end(),
                   QT_MAKE_CHECKED_ARRAY_ITERATOR(this->begin(), this->size()));
         return *this;