bgpd: clean up SA warning in bgp_ecommunity.c

[mjstapp]

An SA has crept in... fix it.

[LabN-CI]

💚 Basic BGPD CI results: SUCCESS, 0 tests failed

Results table

_	_
Result	SUCCESS git merge/6180 83ac8d1
Date	04/07/2020
Start	13:21:39
Finish	13:47:23
Run-Time	25:44
Total	1815
Pass	1815
Fail	0
Valgrind-Errors	0
Valgrind-Loss	0
Details	vncregress-2020-04-07-13:21:39.txt
Log	autoscript-2020-04-07-13:22:34.log.bz2
Memory	496 477 425

For details, please contact louberger

[NetDEF-CI]

Continuous Integration Result: SUCCESSFUL

Congratulations, this patch passed basic tests

Tested-by: NetDEF / OpenSourceRouting.org CI System

CI System Testrun URL: https://ci1.netdef.org/browse/FRR-FRRPULLREQ-11697/

This is a comment from an automated CI system.
For questions and feedback in regards to this CI system, please feel free to email
Martin Winter - mwinter (at) opensourcerouting.org.

Warnings Generated during build:

Debian 10 amd64 build: Successful with additional warnings

Debian Package lintian failed for Debian 10 amd64 build:
(see full package build log at https://ci1.netdef.org/browse/FRR-FRRPULLREQ-11697/artifact/DEB10BUILD/ErrorLog/log_lintian.txt)

W: frr source: pkg-js-tools-test-is-missing
W: frr source: pkg-js-tools-test-is-missing
W: frr-snmp: changelog-file-missing-explicit-entry 6.0-2 -> 7.4-dev-20200407-01-g83ac8d129-0 (missing) -> 7.4-dev-20200407-01-g83ac8d129-0~deb10u1
W: frr-doc: changelog-file-missing-explicit-entry 6.0-2 -> 7.4-dev-20200407-01-g83ac8d129-0 (missing) -> 7.4-dev-20200407-01-g83ac8d129-0~deb10u1
W: frr-rpki-rtrlib: changelog-file-missing-explicit-entry 6.0-2 -> 7.4-dev-20200407-01-g83ac8d129-0 (missing) -> 7.4-dev-20200407-01-g83ac8d129-0~deb10u1
W: frr-pythontools: changelog-file-missing-explicit-entry 6.0-2 -> 7.4-dev-20200407-01-g83ac8d129-0 (missing) -> 7.4-dev-20200407-01-g83ac8d129-0~deb10u1
W: frr: changelog-file-missing-explicit-entry 6.0-2 -> 7.4-dev-20200407-01-g83ac8d129-0 (missing) -> 7.4-dev-20200407-01-g83ac8d129-0~deb10u1