exclude branches with call to fatalerror from the coverage

src/calceph.c

src/calcephast.c

src/calcephbinpckio.c

src/calcephchebyshev.c

src/calcephchebyshev.h

src/calcephfileversion.c

src/calcephidbyname.c

src/calcephinpop.h

src/calcephinpopio.c

src/calcephinpoppositionrecord.c

src/calcephinpoptime.c

src/calcephinternal.h

src/calcephio.c

src/calcephlink.c

src/calcephorientrecord.c

src/calcephpam.c

src/calcephpositionrecord.c

src/calcephspice.c

src/calcephspicetime.c

src/calcephspkinterpolhermite.c