libsamplerate: samplerate.h has comma at end of enumerator list

[ryandesign@…]

When trying to compile darkice (#24867) with its +samplerate variant, I get this error:

In file included from VorbisLibEncoder.h:56,
                 from DarkIce.cpp:92:
/opt/local/include/samplerate.h:177: error: comma at end of enumerator list

It seems having a comma at the end of an enumerated list is valid in C99 but not C89, and if another project is compiling with -pedantic then it will encounter this error.

When we've had other ports in the past that have had this error (e.g. cairo in #26806) we've fixed them; perhaps we can fix this in libsamplerate too.

[ryandesign@…]

proposed patch

[ryandesign@…]

r75920 (maintainer timeout)