ext/console/console.c in console-0.3 vs ext/console/console.c in console-0.4

@@ -15,12 +15,14 @@
 #endif
 
 static inline int calc_width(char* string, long strlen, long byte_offset, size_t* num_bytes, size_t* num_cols) {
   wchar_t wc;
   size_t width = -1;
+  mbstate_t state;
 
-  *num_bytes = mbrtowc(&wc, string + byte_offset, strlen - byte_offset, NULL);
+  memset(&state, 0, sizeof(state));
+  *num_bytes = mbrtowc(&wc, string + byte_offset, strlen - byte_offset, &state);
 
   if(*num_bytes == (size_t)-2) {
     rb_raise(rb_eArgError, "malformed string: incomplete multibyte character at position %ld", byte_offset);
     return -1;
   }
@@ -32,12 +34,9 @@
     rb_raise(rb_eArgError, "malformed string: NULL byte at position %ld", byte_offset);
     return -1;
   }
 
   *num_cols = wcwidth(wc);
-  /* sometimes this seems to happen! maybe it's not bad...
-  if(width == 0) rb_raise(rb_eArgError, "bad string: non-printable character at position %ld", RSTRING_LEN(v_string) - remaining_bytes);
-  */
 
   return 0;
 }
 
 /*