Change the example in the readme, exit when file can't be loaded.

Author: carld

README

@@ -27,10 +27,8 @@ You should see some output like:
   ( 3 ( 1 ( 0 . 0 ) 1 ( 0 . 0 ) 17 5 ) 4 21 )
 
 Then run it, with no second argument lispkit will read the input
-from stdin. Type a number e.g. 9, press enter, then ctrl-d, and
-the result will be printed to stdout:
+from stdin.
 
-  ./lispkit examples/square.o
-  9
-  81
+  echo 5 | ./lispkit examples/square.o
+  25
 

main.c

@@ -73,6 +73,7 @@ main(int argc, char *argv[])
     fp[fpi] = fopen(argv[arg], "ra");
     if (fp[fpi] == NULL || ferror(fp[fpi]) != 0) {
       printf("Could not load '%s': %s\n", argv[arg], strerror(errno));
+      exit(-1);
     }
   }