QWindowsFontDatabase/QWindowsXPStyle: Fix compilation with g++ 8.1/MinGW

Silence warnings about copying/clearing memory types which g++
considers non-trivial, for example:

windows\qwindowsfontdatabase.cpp:1003:75: error: 'void* memcpy(void*, const void*, size_t)' copying an object of non-trivial type 'class QChar' from an array of 'const ushort' {aka 'const short unsigned int'} [-Werror=class-memaccess]
         memcpy(faceNamePtr, faceName.utf16(), sizeof(wchar_t) * nameLength);
qwindowsxpstyle.cpp:946:46: error: 'void* memset(void*, int, size_t)' clearing an object of non-trivial type 'struct ThemeMapData'; use assignment or value-initialization instead [-Werror=class-memaccess]
                 memset(&data, 0, sizeof(data));
                                              ^
qwindowsxpstyle.cpp:1053:38: error: 'void* memset(void*, int, size_t)' clearing an object of non-trivial type 'struct ThemeMapData'; use assignment or value-initialization instead [-Werror=class-memaccess]
         memset(&data, 0, sizeof(data));

by introducing a cast.

Task-number: QTBUG-68742
Task-number: QTQAINFRA-2095
Change-Id: I160eb5fc7b64a2bc404e1fa61d306af2662d1252
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp
index aab1ab9889..8df8da1a38 100644
--- a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp
+++ b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp
@@ -1000,7 +1000,7 @@ static QChar *createFontFile(const QString &faceName)
     if (!faceName.isEmpty()) {
         const int nameLength = qMin(faceName.length(), LF_FACESIZE - 1);
         faceNamePtr = new QChar[nameLength + 1];
-        memcpy(faceNamePtr, faceName.utf16(), sizeof(wchar_t) * nameLength);
+        memcpy(static_cast<void *>(faceNamePtr), faceName.utf16(), sizeof(wchar_t) * nameLength);
         faceNamePtr[nameLength] = 0;
     }
     return faceNamePtr;