Make 2013/birken restore sanity after exit

As long as the program (alt code and otherwise) runs to completion the
program will return instead of 0:

    system("reset");

so that the terminal becomes sane again (otherwise cursor is invisible).
One could also use 'tput cvvis' but this is longer and I wanted to make
the column as close to the original ending as possible.

2013/birken/Makefile

@@ -61,7 +61,7 @@ CDEFINE= -DZ=15000
 
 # Include files that are needed to compile
 #
-CINCLUDE=
+CINCLUDE= -include stdlib.h
 
 # Optimization
 #

2013/birken/README.md

@@ -42,9 +42,16 @@ perl -e 'map{map{print int(rand()*8);}(0..16);print chr(10);}(0..30);' | tr '[0-
 ./try.sh
 ```
 
-If you wish to speed it up 200% you can use instead `-DZ=3750`. Doing this
-you might find the right value to your liking; use ctrl-c to terminate the
-program early.
+If you wish to speed that up 200% you can use instead `-DZ=3750`. Doing this you
+might find the right value to your liking; use ctrl-c to terminate the program
+early but note that the terminal is likely to be messed up. Try:
+
+
+```sh
+reset
+```
+
+to make it sane again (running to completion will do that for you).
 
 
 ## Original code:
@@ -69,8 +76,8 @@ PLEASE be careful if you are sensitive to flashing colours!
 
 ## Judges' remarks:
 
-This program also wins the "Most amusing abuse of the iocccsize tool" award; although not the
-absolute best: it is possible to achieve 0 by writing:
+This program also wins the "Most amusing abuse of the iocccsize tool" award;
+although not the absolute best: it is possible to achieve 0 by writing:
 
 ```c
     /* *\

2013/birken/birken.alt.c

@@ -47,4 +47,4 @@ g[2][g[i][T]]=T; n(R+i)o(e,m              )if(G[T][e]+i) G[T][e]=g[2][G[T][e]];
 ; else if(G[R][T]+i) s++; if(s) { if(V>4){ V=9-V; D++; } V+=29; n(20) q(c[V][T][0],c
 [V][T][i],D); } } n(19) if((L=G[R][T])+i) { O=T-L; e=O>9; t=e?18-O :O; o(K,((t&3)-3?
 16:37)){ if(K){ L=c[t+19][K-i][0]; O=c[t+19][K-i][i] ; } q(L,O,K && e); } } if(s) q(
-c[V][20][0], c[V][20][i], D); R--; } printf("\33[47;1f\33[?25h\33[40m"); return 0; }
+c[V][20][0], c[V][20][i], D); R--; } printf("\33[47;1f\33[?25h\33[40m"); return system("reset"); }

2013/birken/birken.c

@@ -46,4 +46,4 @@ g[2][g[i][T]]=T; n(R+i)o(e,m              )if(G[T][e]+i) G[T][e]=g[2][G[T][e]];
 ; else if(G[R][T]+i) s++; if(s) { if(V>4){ V=9-V; D++; } V+=29; n(20) q(c[V][T][0],c
 [V][T][i],D); } } n(19) if((L=G[R][T])+i) { O=T-L; e=O>9; t=e?18-O :O; o(K,((t&3)-3?
 16:37)){ if(K){ L=c[t+19][K-i][0]; O=c[t+19][K-i][i] ; } q(L,O,K && e); } } if(s) q(
-c[V][20][0], c[V][20][i], D); R--; } printf("\33[47;1f\33[?25h\33[40m"); return 0; }
+c[V][20][0], c[V][20][i], D); R--; } printf("\33[47;1f\33[?25h\33[40m"); return system("reset");}

2013/birken/try.sh

@@ -18,7 +18,7 @@ if [[ -z "$BIRKEN" ]]; then
     BIRKEN="birken.alt"
 fi
 
-trap "clear; exit" SIGINT
+trap 'reset; exit' 0 1 2 3 15
 
 for i in *.txt; do
     NAME="$(echo "$i" | awk '{ print toupper(substr($1,1,1)) substr($1,2)}'|sed -e 's/\.txt//g' \