Fix endless recursion on webui_malloc in debug mode.

We're sure the length of the debug message of _webui_malloc < 256,
so in that case we have enough room to print the debug message
without allocating memory with _webui_malloc, which prevents an
endless recursion to _webui_log.


Signed-off-by: Hans Dijkema <hans@dijkewijk.nl>

Author: hdijkema

src/webui.c

@@ -727,14 +727,16 @@ static void _webui_log(size_t level, const char *format, va_list args) {
             _webui.logger_func(WEBUI_LOGGER_LEVEL_ERROR, "Log formatting error", _webui.logger_user_data);
             return;
         }
-        char *buffer = _webui_malloc(needed_size + 1);
+
+        char buf[256];
+        char *buffer = (needed_size > 255) ? _webui_malloc(needed_size + 1) : buf;
         if (buffer == NULL) {
             _webui.logger_func(WEBUI_LOGGER_LEVEL_ERROR, "Memory allocation failed for log", _webui.logger_user_data);
             return;
         }
         vsnprintf(buffer, needed_size + 1, format, args);
         _webui.logger_func(level, buffer, _webui.logger_user_data);
-        _webui_free_mem((void*)buffer);
+        if (buffer != buf) _webui_free_mem((void*)buffer);
     }
 }