Ensure cs2cs emulation gets correct ellipsoid defn (#798)

Copy ellipsoid definition for proj=cart directly into the
proj_create call, rather than calling pj_inherit_ellipsoid_def
afterwards.

Previously, the ellipsoid definition was left out from the call.

pj_init_ctx would then pick up WGS84 from proj_def.dat, and the
init would succeed (and the possibly wrong ellipsoid definition
would later on be overwritten with the correct values by
pj_inherit_ellipsoid_def.

But if PROJ_LIB was not set or proj_def.dat was inaccessible for
other reasons, things went wrong.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/pj_geocent.c b/src/pj_geocent.c
index 6530b103..3d771c43 100644
--- a/src/pj_geocent.c
+++ b/src/pj_geocent.c
@@ -48,7 +48,7 @@ static LP inverse(XY xy, PJ *P) {
     return lp;
 }
 
-PJ *PROJECTION(geocent) {
+PJ *CONVERSION (geocent, 0) {
     P->is_geocent = 1;
     P->x0 = 0.0;
     P->y0 = 0.0;