clang-tidy nit: proj_trans has inconsistent declaration

[schwehr]

readability-inconsistent-declaration-parameter-name:

function 'proj_trans' has 1 other declaration with different parameter names
src/proj_internal.h:76:12: the 1st inconsistent declaration seen here
src/proj_internal.h:76:12: differing parameters are named here: ('obs'), in the other declaration: ('coord')

I see:

egrep 'PJ_COORD +proj_trans +[(]' *
proj.h:PJ_COORD proj_trans (PJ *P, PJ_DIRECTION direction, PJ_COORD coord);
proj_4D_api.c:PJ_COORD proj_trans (PJ *P, PJ_DIRECTION direction, PJ_COORD coo) {
proj_internal.h:PJ_COORD   proj_trans   (PJ *P, PJ_DIRECTION direction, PJ_COORD obs);

[kbevers]

Nice catch.

I don't think there's any reason for declaring the function in proj_internal.h actually. Otherwise coo should be replaced by coord.