add assertion
diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 33cf19f..ed38c3c 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -2327,6 +2327,7 @@
     size_t BUFFER_SIZE = 1000;

     char* buffer = new char[BUFFER_SIZE];

 

+    TIXMLASSERT(sizeof(error) <= sizeof(int));

     TIXML_SNPRINTF(buffer, BUFFER_SIZE, "Error=%s ErrorID=%d (0x%x) Line number=%d", ErrorIDToName(error), int(error), int(error), lineNum);

 

 	if (format) {