cmMakefile: Simplify InitializeFromParent method.

Provide a parent instead of requiring it to be computed through
the cmLocalGenerator.

Source/cmMakefile.cxx

@@ -1485,10 +1485,8 @@ void cmMakefile::AddLinkDirectory(const std::string& dir)
     }
 }
 
-void cmMakefile::InitializeFromParent()
+void cmMakefile::InitializeFromParent(cmMakefile* parent)
 {
-  cmMakefile *parent = this->LocalGenerator->GetParent()->GetMakefile();
-
   // Initialize definitions with the closure of the parent scope.
   this->Internal->InitializeDefinitions(parent);
 
@@ -1672,7 +1670,7 @@ void cmMakefile::Configure()
 
 void cmMakefile::ConfigureSubDirectory(cmMakefile *mf)
 {
-  mf->InitializeFromParent();
+  mf->InitializeFromParent(this);
   std::string currentStart = mf->GetCurrentSourceDirectory();
   if (this->GetCMakeInstance()->GetDebugOutput())
     {

Source/cmMakefile.h

@@ -728,7 +728,7 @@ public:
   cmPropertyMap &GetProperties() { return this->Properties; }
 
   ///! Initialize a makefile from its parent
-  void InitializeFromParent();
+  void InitializeFromParent(cmMakefile* parent);
 
   void AddInstallGenerator(cmInstallGenerator* g)
     { if(g) this->InstallGenerators.push_back(g); }