Fix to stop a fall-through in a switch statement

The following fixes a fall-through that prevented from reading the
next entry in the UTMP file and terminated the program with an abort().

newlib/libc/unix/getut.c

@@ -65,6 +65,7 @@ getutid (struct utmp *id)
 	case DEAD_PROCESS:
 	  if (id->ut_id == utmp_data.ut_id)
 	    return &utmp_data;
+	  break;
 	default:
 	  abort ();
 	}