OBJPROFILE bugfix

Julia build failed when the macro ``OBJPROFILE`` is defined to c compiler because of these reasons:

* typo: ``JL_STDERR`` wrong to ``jl_stderr``
* type ``DataType`` could not be ``show``  while compiling
* the type of the objects being tracked may be something else rather than a regular ``DataType``

This commit fixed the bug and deleted some trailing-whitespaces(by my editor).