2013-01-24  Sharath Kamath  <kamath.sharath@gmail.com>

        Memory leak in WebCL causing crash of safari.
        Issue #79
        Reviewed by NOBODY.

        Only the base class destructor must be made virtual. Else causes memory leak since it doesnt call the
        destructor in right order.

        No new tests.

        * Modules/webcl/WebCLBuffer.h:
        (WebCLBuffer):
        * Modules/webcl/WebCLImage.h:
        (WebCLImage):
        * Modules/webcl/WebCLMemoryObject.h:
        (WebCLMemoryObject):