Mark status when parsing is terminated

src/ifcparse/IfcFile.h

@@ -42,7 +42,8 @@ class IFC_PARSE_API file_open_status {
         SUCCESS,
         READ_ERROR,
         NO_HEADER,
-        UNSUPPORTED_SCHEMA
+        UNSUPPORTED_SCHEMA,
+        INVALID_SYNTAX
     };
 
   private:

src/ifcparse/IfcParse.cpp

@@ -1378,6 +1378,7 @@ void IfcFile::initialize_(IfcParse::IfcSpfStream* s) {
         }
 
         if (next_token.type == Token_NONE) {
+            good_ = file_open_status::INVALID_SYNTAX;
             break;
         }