Fix article in value of mission_name() for MI_OSUPPORT argument

While there, oops on bad argument.

diff --git a/src/lib/subs/mission.c b/src/lib/subs/mission.c
index c36a5220813b87f12b0c1442816968880ac01987..26f21a24929238b5ff7c721e70da437402764985 100644 (file)
--- a/src/lib/subs/mission.c
+++ b/src/lib/subs/mission.c
@@ -750,7 +750,7 @@ mission_name(short mission)
     case MI_SUPPORT:
        return "a support";
     case MI_OSUPPORT:
-       return "a offensive support";
+       return "an offensive support";
     case MI_DSUPPORT:
        return "a defensive support";
     case MI_RESERVE:
@@ -762,6 +762,7 @@ mission_name(short mission)
     case MI_AIR_DEFENSE:
        return "an air defense";
     }
+    CANT_REACH();
     return "a mysterious";
 }