Deprecate unused global 'error' function

src/base/application.cpp

@@ -112,6 +112,7 @@ void Application::Messages::setLogger(Logger* _logwriter)
 
 void Application::Messages::logerror(const std::string& msg)
 {
+    Cantera::warn_deprecated("Application::Messages::logerror");
     logwriter->error(msg) ;
 }
 

src/base/application.h

@@ -144,6 +144,7 @@ protected:
          *  is not desired, then derive a class and reimplement this method.
          *
          * @param msg    Error message to be written to cerr.
+         * @deprecated To be removed after Cantera 2.2
          */
         void logerror(const std::string& msg) ;
 

src/base/global.cpp

@@ -70,6 +70,7 @@ void writelogendl()
 
 void error(const std::string& msg)
 {
+    warn_deprecated("error");
     app()->logerror(msg);
 }