Fix segfault in xrick 010808 when the -keys option is given
key codes longer than 15 characters. -- AYM 2002-01-10

diff -ur xrick-010808/src/sysarg.c xrick-010808-keys/src/sysarg.c
--- xrick-010808/src/sysarg.c	Sun Jul 29 16:23:16 2001
+++ xrick-010808-keys/src/sysarg.c	Thu Jan 10 14:58:04 2002
@@ -7,6 +7,7 @@
  * disclaimers, etc.
  */
 
+#include <stddef.h>  /* size_t */
 #include <stdlib.h>  /* atoi */
 #include <string.h>  /* strcasecmp */
 
@@ -73,40 +74,45 @@
 sysarg_scankeys(char *keys)
 {
   char k[16];
-  int i, j;
+  size_t i, j;
 
   i = 0;
 
   j = 0;
-  while (keys[i] != '\0' && keys[i] != '-') k[j++] = keys[i++];
+  while (keys[i] != '\0' && keys[i] != '-' && j + 1 < sizeof k)
+    k[j++] = keys[i++];
   if (keys[i++] == '\0') return -1;
   k[j] = '\0';
   syskbd_left = sysarg_sdlcode(k);
   if (!syskbd_left) return -1;
 
   j = 0;
-  while (keys[i] != '\0' && keys[i] != '-') k[j++] = keys[i++];
+  while (keys[i] != '\0' && keys[i] != '-' && j + 1 < sizeof k)
+    k[j++] = keys[i++];
   if (keys[i++] == '\0') return -1;
   k[j] = '\0';
   syskbd_right = sysarg_sdlcode(k);
   if (!syskbd_right) return -1;
 
   j = 0;
-  while (keys[i] != '\0' && keys[i] != '-') k[j++] = keys[i++];
+  while (keys[i] != '\0' && keys[i] != '-' && j + 1 < sizeof k)
+    k[j++] = keys[i++];
   if (keys[i++] == '\0') return -1;
   k[j] = '\0';
   syskbd_up = sysarg_sdlcode(k);
   if (!syskbd_up) return -1;
 
   j = 0;
-  while (keys[i] != '\0' && keys[i] != '-') k[j++] = keys[i++];
+  while (keys[i] != '\0' && keys[i] != '-' && j + 1 < sizeof k)
+    k[j++] = keys[i++];
   if (keys[i++] == '\0') return -1;
   k[j] = '\0';
   syskbd_down = sysarg_sdlcode(k);
   if (!syskbd_down) return -1;
 
   j = 0;
-  while (keys[i] != '\0' && keys[i] != '-') k[j++] = keys[i++];
+  while (keys[i] != '\0' && keys[i] != '-' && j + 1 < sizeof k)
+    k[j++] = keys[i++];
   if (keys[i] != '\0') return -1;
   k[j] = '\0';
   syskbd_fire = sysarg_sdlcode(k);