--- stack/stack.c	2002/02/07 23:55:21	1.52
+++ stack/stack.c	2002/02/08 00:25:57	1.54
@@ -99,7 +99,9 @@
       }
       free(val);		/* Free the actual list value */
       break;
-    default:
+    case integer:
+    case func:
+    case symb:
       break;
     }
   }
@@ -205,8 +207,8 @@
   strcpy(new_string, "sx_");	/* Stack eXternal */
   current=new_string+3;
   while(old_string[0] != '\0'){
-    current[0]=validchars[old_string[0]/16];
-    current[1]=validchars[old_string[0]%16];
+    current[0]=validchars[(unsigned char)(old_string[0])/16];
+    current[1]=validchars[(unsigned char)(old_string[0])%16];
     current+=2;
     old_string++;
   }
@@ -539,7 +541,8 @@
     free(temp_string);
     break;
 
-  default:
+  case integer:
+    break;
   }
 }