fix warning

Source/cmEndForEachCommand.cxx

@@ -16,7 +16,7 @@
 =========================================================================*/
 #include "cmEndForEachCommand.h"
 
-bool cmEndForEachCommand::InvokeInitialPass(std::vector<cmListFileArgument> const& args)
+bool cmEndForEachCommand::InvokeInitialPass(std::vector<cmListFileArgument> const&)
 {
   this->SetError("An ENDFOREACH command was found outside of a proper FOREACH ENDFOREACH structure. Or its arguments did not match the opening FOREACH command.");
   return false;