Fix 2001/schweikh - check args

This was not documented. The limitations have not been addressed as they
were documented. The bugs.md and README.md have been updated for this.

2001/schweikh/README.md

@@ -16,7 +16,7 @@ make
 The current status of this entry is:
 
 ```
-STATUS: known bug - please help us fix
+STATUS: INABIAF - please **DO NOT** fix
 ```
 
 For more detailed information see [2001 schweikh in bugs.md](/bugs.md#2001-schweikh).

2001/schweikh/schweikh.c

@@ -1 +1 @@
-main(int c,char**v){return!m(v[1],v[2]);}m(char*s,char*t){return*t-42?*s?63==*t|*s==*t&&m(s+1,t+1):!*t:m(s,t+1)||*s&&m(s+1,t);}
+main(int c,char**v){return c<3?1:!m(v[1],v[2]);}m(char*s,char*t){return*t-42?*s?63==*t|*s==*t&&m(s+1,t+1):!*t:m(s,t+1)||*s&&m(s+1,t);}