Comment 1 for bug 623665

The definition with the misspelled name is only used if _IN_ACQUISITION_C is not defined. The Acquisition.c file first defines this and then included Acquisition.h, so the aq_get function works.

It would only be a problem for someone including Acquisition.h in their own C code and then relying on the aq_get function. I'm not aware of anyone doing that, which is probably why this has gone unnoticed for the past decade.