Fix R_AddSingleSpriteDef's I_Error messages

Whoops, seems I forgot about this little branch. Basically this fixes how for a character's sprites, a full sprite lump name is displayed instead of just its sprite prefix in the "R_AddSingleSpriteDef: No patches found for [sprite prefix] frame [frame character]" message (unlike when it occurs for non-character sprites), resulting in something like "R_AddSingleSpriteDef: No patches found for PLAYC2C8 frame ^" which does NOT help custom character authors at all as it just confuses them instead. (for the record, the problem would actually with the ^ frame and not the ones displayed after "PLAY")

Oh, and the same problem is also fixed for this similar message: "R_AddSingleSpriteDef: Sprite [sprite prefix] frame [frame character] is missing rotations"

src/r_things.c

@@ -280,7 +280,7 @@ static boolean R_AddSingleSpriteDef(const char *sprname, spritedef_t *spritedef,
{
case 0xff:
// no rotations were found for that frame at all
-			I_Error("R_AddSingleSpriteDef: No patches found for %s frame %c", sprname, R_Frame2Char(frame));
+			I_Error("R_AddSingleSpriteDef: No patches found for %.4s frame %c", sprname, R_Frame2Char(frame));
break;
case 0:
@@ -293,7 +293,7 @@ static boolean R_AddSingleSpriteDef(const char *sprname, spritedef_t *spritedef,
// we test the patch lump, or the id lump whatever
// if it was not loaded the two are LUMPERROR
if (sprtemp[frame].lumppat[rotation] == LUMPERROR)
-					I_Error("R_AddSingleSpriteDef: Sprite %s frame %c is missing rotations",
+					I_Error("R_AddSingleSpriteDef: Sprite %.4s frame %c is missing rotations",
sprname, R_Frame2Char(frame));
break;
}