bugfix in error message

[[Imported from SVN: r4728]]

common/configparser.cc

@@ -15,12 +15,12 @@ using namespace std;
 ConfigParser::ConfigParser()
 {}
 
-void ConfigParser::parseFile(string file)
+void ConfigParser::parseFile(std::string file)
 {
   ifstream in(file.c_str());
 
   if (!in)
-    DUNE_THROW(IOError, "Could open configuration file " << file);
+    DUNE_THROW(IOError, "Could not open configuration file " << file);
 
   string prefix;
   set<string> keysInFile;