Test error name is non-empty for the whole range
diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 667170f..286827a 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -1964,7 +1964,9 @@
 const char* XMLDocument::ErrorName() const

 {

 	TIXMLASSERT( _errorID >= 0 && _errorID < XML_ERROR_COUNT );

-	return _errorNames[_errorID];

+    const char* errorName = _errorNames[_errorID];

+    TIXMLASSERT( errorName && errorName[0] );

+    return errorName;

 }

 

 void XMLDocument::PrintError() const

diff --git a/xmltest.cpp b/xmltest.cpp
index 5e0eb3a..1c04668 100644
--- a/xmltest.cpp
+++ b/xmltest.cpp
@@ -1498,6 +1498,14 @@
 	    delete doc;

     }

 

+	{

+		XMLDocument doc;

+		for( int i = 0; i < XML_ERROR_COUNT; i++ ) {

+			doc.SetError( (XMLError)i, 0, 0 );

+			doc.ErrorName();

+		}

+	}

+

     // ----------- Performance tracking --------------

 	{

 #if defined( _MSC_VER )