V3fArrayFromBuffer Memory Leak

[cbreak-black]

Hi

There's a memory leak in imath.V3fArrayFromBuffer and related functions, caused by creating a PyBuffer with PyObject_GetBuffer, but not releasing it on all paths with PyBuffer_Release. It can be solved like this:

diff --git a/src/python/PyImath/PyImathBufferProtocol.cpp b/src/python/PyImath/PyImathBufferProtocol.cpp
index 75e7006..a579b55 100644
--- a/src/python/PyImath/PyImathBufferProtocol.cpp
+++ b/src/python/PyImath/PyImathBufferProtocol.cpp
@@ -361,6 +361,7 @@ fixedArrayFromBuffer (PyObject *obj)
 
     ArrayT *array = new ArrayT (view.shape[0], PyImath::UNINITIALIZED);
     memcpy (&array->direct_index(0), view.buf, view.len);
+    PyBuffer_Release(&view);
 
     return array;
 }