Hello,

I compiled a simple pix object and can't get pd to load it. 

(latest Pd test7 from upstream/master compiled for 32bit in OSX 10.11.6...)

I get this error that I don't understand on pd log :

```

/Users/federicocamarahalac/Documents/fd_lib/pix_fft/pix_fft.pd_darwin: 

dlopen(/Users/federicocamarahalac/Documents/fd_lib/pix_fft/pix_fft.pd_darwin, 

10): Symbol not found: __ZN7GemBase14beforeDeletionEv

  Referenced from: /Users/federicocamarahalac/Documents/fd_lib/pix_fft/pix_fft.pd_darwin

  Expected in: flat namespace

 in /Users/federicocamarahalac/Documents/fd_lib/pix_fft/pix_fft.pd_darwin

```

This is the compilation:

```

g++ -DPD -I "/usr/local/include/pd" -I "/Users/federicocamarahalac/Documents/Gem/src" -DUNIX 

-DMACOSX -I /sw/include -Wall -Wextra -Wshadow -Winline -Wstrict-aliasing

-O3 -ffast-math -funroll-loops -fomit-frame-pointer -arch i386 -o pix_fft.o -c pix_fft.cpp

```

And the linking:

```

g++ -undefined suppress -flat_namespace -bundle -arch i386 

-o pix_fft.pd_darwin pix_fft.o /usr/local/lib/libfftw3f.a

```

After compiling, I had no errors and two warnings:

```

pix_fft.cpp:45:5: warning: field 'm_buffer' will be initialized after field 'm_bufsize' [-Wreorder]

    m_buffer(0),

    ^

pix_fft.cpp:49:5: warning: field 'm_data' will be initialized after field 'm_bytemode' [-Wreorder]

    m_data(0),

    ^

```

What am I doing wrong? 

I opened an issue on github about this as well: #149

I would really appreciate feedback on this, let me know if you need more info.

Thanks,

Fede