PVS-Studio warning V512 for OGRE

Real w, x, y, z;
...

inline Quaternion(Real* valptr)
{
  memcpy(&w, valptr, sizeof(Real)*4);
}

There's no error, but this code is dangerous.

This suspicious code was found in OGRE project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memcpy' function will lead to a buffer overflow or underflow. OgreMain ogrequaternion.h 87

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/