couple fixes

src/chat.c

@@ -207,6 +207,9 @@ static void chat_onFileData(ToxWindow *self, Tox *m, int num, uint8_t filenum, u
 
      // we have a problem here, but don't let it segfault
     if (file_to_save == NULL) {
+        wattron(ctx->history, COLOR_PAIR(RED));
+        wprintw(ctx->history, "* Error writing to file.\n");
+        wattroff(ctx->history, COLOR_PAIR(RED));
         return;
     }
 

src/global_commands.c

@@ -239,7 +239,7 @@ void cmd_nick(WINDOW *window, ToxWindow *self, Tox *m, int argc, char (*argv)[MA
 
     if (len > TOXIC_MAX_NAME_LENGTH) {
         nick[TOXIC_MAX_NAME_LENGTH] = L'\0';
-        len = TOXIC_MAX_NAME_LENGTH;
+        len = TOXIC_MAX_NAME_LENGTH - 1;
     }
 
     tox_setname(m, nick, len+1);

src/misc_tools.c

@@ -152,4 +152,4 @@ bool valid_nick(uint8_t *nick)
     }
 
     return true;
-}
+}

src/misc_tools.h

@@ -35,4 +35,4 @@ int name_compare(const void *nick1, const void *nick2);
       - cannot be empty
       - cannot start with a space
       - must not contain contiguous spaces */
-bool valid_nick(uint8_t *nick);
+bool valid_nick(uint8_t *nick);