fixed MSVC12 compilation error in test_buffers.cpp

[cmcmurrough]

MSVC 12 complains about an ambiguous type on a couple of test checks, added (double) cast to fix.

[SergioRAgostinho]

I don't like this. eptr is of template type T and I assume buffer is something similar. It doesn't make sense to cast them always to double...

[taketwo]

I agree with what Sergio wrote. Could you try to replace isnan with pcl_isnan and see if it helps?

[SergioRAgostinho]

@UnaNancyOwen are you by any chance still running MSVC12? I have the impression the earliest you have now is MSVC13. Nevertheless can you give a go at this test and see if the compiler complains about it?

[UnaNancyOwen]

@SergioRAgostinho @taketwo I tried tested with MSVC12 and MSVC14.
It can successfully build when replace to pcl_isnan() from isnan().

if (pcl_isnan (eptr[j]))
  EXPECT_TRUE (pcl_isnan (buffer[j]));