Fix cast warnings with MSVC

src/utilities/fileutils.cpp

@@ -59,7 +59,7 @@ bool Copy(QIODevice *source, QIODevice *destination) {
   if (!destination->open(QIODevice::WriteOnly)) return false;
 
   const qint64 bytes = source->size();
-  unique_ptr<char[]> data(new char[bytes]);
+  unique_ptr<char[]> data(new char[static_cast<size_t>(bytes)]);
   qint64 pos = 0;
 
   qint64 bytes_read = 0;

src/utilities/scopedwchararray.cpp

@@ -23,7 +23,7 @@
 #include "scopedwchararray.h"
 
 ScopedWCharArray::ScopedWCharArray(const QString &str)
-    : chars_(str.length()), data_(new wchar_t[chars_ + 1]) {
+    : chars_(str.length()), data_(new wchar_t[static_cast<size_t>(chars_ + 1)]) {
   str.toWCharArray(data_.get());
-  data_[chars_] = '\0';
+  data_[static_cast<size_t>(chars_)] = '\0';
 }

src/utilities/scopedwchararray.h

@@ -36,7 +36,7 @@ class ScopedWCharArray {
   explicit operator wchar_t *() const { return get(); }
 
   qint64 characters() const { return chars_; }
-  qint64 bytes() const { return (chars_ + 1) * sizeof(wchar_t); }
+  qint64 bytes() const { return (chars_ + 1) * static_cast<qint64>(sizeof(wchar_t)); }
 
  private:
   Q_DISABLE_COPY(ScopedWCharArray)

src/utilities/sqlhelper.h

@@ -80,7 +80,7 @@ uint SqlHelper::ValueToUInt(const T &q, const int n) {
 
   Q_ASSERT(n < q.count());
 
-  return q.value(n).isNull() || q.value(n).toInt() < 0 ? 0 : q.value(n).toInt();
+  return q.value(n).isNull() || q.value(n).toInt() < 0 ? 0 : q.value(n).toUInt();
 
 }