a0b51afc01musig: VERIFY_CHECK preconditions of _musig_keyaggcoef_internal() (Tim Ruffing)da7702844eextrakeys: Clarify comparison order of compare/sort functions (Tim Ruffing) Pull request description: ACKs for top commit: jonasnick: ACKa0b51afc01Tree-SHA512: ad509d7a55c6f832a25b896b0fe38e259b79864b2a8d1fb337b9d9b4a5e1950a9d579040285465c89d815becc6e49af4129ab2d904d32ac98cef74357a440c89