e089eecc1egroup: Further simply gej_add_ge (Tim Ruffing)ac71020ebegroup: Save a normalize_to_zero in gej_add_ge (Tim Ruffing) Pull request description: As discovered by sipa in #1033. See commit message for reasoning but note that the infinity handling will be replaced in the second commit again. ACKs for top commit: sipa: ACKe089eecc1eapoelstra: ACKe089eecc1eTree-SHA512: fb1b5742e73dd8b2172b4d3e2852490cfd626e8673b72274d281fa34b04e9368a186895fb9cd232429c22b14011df136f4c09bdc7332beef2b3657f7f2798d66