CDB: Dump Qt 5 / QString correctly.

Adapt to recent change basing QStringData on QTypedArrayData.

Change-Id: I8145015e31ca10bc484d01e8082a2f97d6750285
Reviewed-by: hjk <qthjk@ovi.com>

src/libs/qtcreatorcdbext/symbolgroupvalue.cpp

@@ -1495,7 +1495,10 @@ static inline bool dumpQString(const SymbolGroupValue &v, std::wostream &str)
     wchar_t *memory;
     unsigned fullSize;
     unsigned size;
-    if (!readQt5StringData(dV, qtInfo.version, true, 10240, &fullSize, &size, &memory))
+    const SymbolGroupValue typeArrayV = dV[unsigned(0)];
+    if (!typeArrayV)
+        return false;
+    if (!readQt5StringData(typeArrayV, qtInfo.version, true, 10240, &fullSize, &size, &memory))
         return false;
     if (size) {
         str << L'"' << memory;