ENH: Better error message for unclosed blocks

This centralizes construction of the error message for an unclosed
logical block (if, foreach, etc.).  We record the line at which each
block is opened so it can be reported in the error message.

Source/cmForEachCommand.cxx

@@ -107,15 +107,6 @@ ShouldRemove(const cmListFileFunction& lff, cmMakefile& mf)
   return false;
 }
 
-void cmForEachFunctionBlocker::
-ScopeEnded(cmMakefile &mf) 
-{
-  cmSystemTools::Error("The end of a CMakeLists file was reached with a "
-                       "FOREACH statement that was not closed properly. "
-                       "Within the directory: ", 
-                       mf.GetCurrentDirectory());
-}
-
 bool cmForEachCommand
 ::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
 {