QStaticByteArrayMatcher: fix MSVC warning

MSVC 2013 complained:

  src/corelib/tools/qbytearraymatcher.h(143) : warning C4351: new behavior: elements of array 'QStaticByteArrayMatcher<6>::m_pattern' will be default initialized

Fix the same way as 9a07ab9234: by suppressing
the warning.

Change-Id: Ic41f7eabe7e39709d76e6062f5891cdcfaa6e1ed
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

src/corelib/tools/qbytearraymatcher.h

@@ -132,6 +132,9 @@ private:
     }
 };
 
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_MSVC(4351) // MSVC 2013: "new behavior: elements of array ... will be default initialized"
+                              // remove once we drop MSVC 2013 support
 template <uint N>
 class QStaticByteArrayMatcher : QStaticByteArrayMatcherBase
 {
@@ -153,6 +156,8 @@ public:
     QByteArray pattern() const { return QByteArray(m_pattern, int(N - 1)); }
 };
 
+QT_WARNING_POP
+
 template <uint N>
 Q_DECL_RELAXED_CONSTEXPR QStaticByteArrayMatcher<N> qMakeStaticByteArrayMatcher(const char (&pattern)[N]) Q_DECL_NOTHROW
 { return QStaticByteArrayMatcher<N>(pattern); }