v4 CheckPath.m: use mkdir() instead of system call

git-svn-id: https://www.dynare.org/svn/dynare/dynare_v4@599 ac1d8469-bf42-47a9-8791-bf33cf982152

matlab/CheckPath.m

@@ -5,5 +5,5 @@ global M_
 DirectoryName = [ M_.dname '\' type ];
 
 if ~isdir(DirectoryName) 
-    system([ 'md ' DirectoryName]); 
+    mkdir('.',DirectoryName); 
 end
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