fixes parts of bug 99:

http://bug.modelicacommunity.org/show_bug.cgi?id=99
I added to modelica.h:
 typedef modelica_real sample_rettype;


git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@2519 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

c_runtime/modelica.h

@@ -80,7 +80,7 @@ typedef modelica_real edge_rettype;
 typedef modelica_real initial_rettype;
 typedef modelica_real noEvent_rettype;
 typedef modelica_real floor_rettype;
-
+typedef modelica_real sample_rettype;
 
 #if defined(__cplusplus)
 }