Partially revert commit #69efc894. Test for...

Partially revert commit #69efc894. Test for Octave/Matlab to decide how to call the print command. Added a warning stating that Octave cannot create pdf files.

matlab/dyn_saveas.m

@@ -31,11 +31,19 @@ function dyn_saveas(h,fname,DynareOptions)
 % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
 
 if any(strcmp('eps',cellstr(DynareOptions.graph_format)))
-    eval(['print -depsc2 ' fname]);% '.eps']);
+    if exist('OCTAVE_VERSION')
+        eval(['print -depsc2 ' fname '.eps']);
+    else
+        eval(['print -depsc2 ' fname]);
+    end
 end
 if any(strcmp('pdf',cellstr(DynareOptions.graph_format)))
+    if exist('OCTAVE_VERSION')
+        warning('Octave cannot create pdf files!')
+    else
         eval(['print -dpdf ' fname]);
     end
+end
 if ~exist('OCTAVE_VERSION') ...
    && any(strcmp('fig',cellstr(DynareOptions.graph_format)))
     if DynareOptions.nodisplay