PVS-Studio warning V522 for Scilab

inline static int *alloc(void * pvApiCtx, const int position,
  const int rows, const int cols, int * ptr)
{
  int * _ptr = 0;
  SciErr err = allocMatrixOfInteger32(
    pvApiCtx, position, rows, cols, &_ptr);
  checkError(err);
  return _ptr;
}

inline static void create(void * pvApiCtx, const int position,
  const int rows, const int cols, long long * ptr)
{
  int * dataPtr = 0;
  alloc(pvApiCtx, position, rows, cols, dataPtr);
  for (int i = 0; i < rows * cols; i++)
  {
    dataPtr[i] = static_cast<int>(ptr[i]);
  }
}

This is what should have been written here: dataPtr = alloc(pvApiCtx, position, rows, cols, dataPtr);


This suspicious code was found in Scilab project by PVS-Studio static code analyzer.
Warning message is:
V522 Dereferencing of the null pointer 'dataPtr' might take place. scilababstractmemoryallocator.hxx 222

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/