Doc: Address some "No documentation for..." QDoc warnings

Task-number: QTBUG-36985

Change-Id: I8619fb77e7879399064281f7bbefe5f12d3849a2
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>

src/corelib/tools/qbytearray.cpp

@@ -3665,12 +3665,6 @@ QByteArray QByteArray::toBase64(Base64Options options) const
     \sa toUShort()
 */
 
-/*!
-    \overload
-
-    \sa toLongLong()
-*/
-
 static char *qulltoa2(char *p, qulonglong n, int base)
 {
 #if defined(QT_CHECK_RANGE)
@@ -3689,6 +3683,11 @@ static char *qulltoa2(char *p, qulonglong n, int base)
     return p;
 }
 
+/*!
+    \overload
+
+    \sa toLongLong()
+*/
 QByteArray &QByteArray::setNum(qlonglong n, int base)
 {
     const int buffsize = 66; // big enough for MAX_ULLONG in base 2

src/corelib/tools/qstring.cpp

@@ -1494,6 +1494,10 @@ QString::QString(QChar ch)
     \internal
 */
 
+/*! \fn QString::QString(QStringDataPtr)
+    \internal
+*/
+
 /*! \fn QString &QString::operator=(const Null &)
     \internal
 */
@@ -8464,6 +8468,11 @@ bool operator<(const QStringRef &s1,const QStringRef &s2)
     this string reference, returning the result.
 */
 
+/*!
+    \typedef QString::Data
+    \internal
+*/
+
 /*!
     \typedef QString::DataPtr
     \internal

src/gui/opengl/qopenglversionfunctions.cpp

@@ -191,6 +191,8 @@ QAbstractOpenGLFunctions::~QAbstractOpenGLFunctions()
     delete d_ptr;
 }
 
+/*! \internal
+ */
 bool QAbstractOpenGLFunctions::initializeOpenGLFunctions()
 {
     Q_D(QAbstractOpenGLFunctions);