Fix leak in PyImage_color_conv.

The input buffer is copied internally when PyByteArray_FromStringAndSize is called, so it doesn't need to stay around.
matplotlib · mdboom · Nov 2, 2015 · Oct 31, 2015 · Oct 31, 2015 · 5545d21b7bc94cb8aea2ac7eaef29a44f24e7cf8
commit 5545d21b7bc94cb8aea2ac7eaef29a44f24e7cf8
diff --git a/src/_image_wrapper.cpp b/src/_image_wrapper.cpp
@@ -177,8 +177,8 @@ static PyObject *PyImage_color_conv(PyImage *self, PyObject *args, PyObject *kwd
                      free(buff));
 
     PyObject *result = PyByteArray_FromStringAndSize((const char *)buff, size);
+    free(buff);
     if (result == NULL) {
-        free(buff);
         return NULL;
     }