QXmlStreamReader: fix a qint64 -> int truncation

QIODevice::read() returns qint64, not int, and nbytesread is qint64,
too.

Pick-to: 5.15
Change-Id: I6d41c5c656336a95bb115b461282e9f247493c25
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/corelib/serialization/qxmlstream.cpp b/src/corelib/serialization/qxmlstream.cpp
index bbec904795..8130cc0b5c 100644
--- a/src/corelib/serialization/qxmlstream.cpp
+++ b/src/corelib/serialization/qxmlstream.cpp
@@ -1490,8 +1490,8 @@ uint QXmlStreamReaderPrivate::getChar_helper()
         nbytesread = 0;
     if (device) {
         rawReadBuffer.resize(BUFFER_SIZE);
-        int nbytesreadOrMinus1 = device->read(rawReadBuffer.data() + nbytesread, BUFFER_SIZE - nbytesread);
-        nbytesread += qMax(nbytesreadOrMinus1, 0);
+        qint64 nbytesreadOrMinus1 = device->read(rawReadBuffer.data() + nbytesread, BUFFER_SIZE - nbytesread);
+        nbytesread += qMax(nbytesreadOrMinus1, qint64{0});
     } else {
         if (nbytesread)
             rawReadBuffer += dataBuffer;