core: fix signature

include/eigenpy/numpy.hpp

@@ -45,7 +45,7 @@ namespace eigenpy
 
   EIGENPY_DLLEXPORT PyTypeObject * getPyArrayType();
 
-  EIGENPY_DLLEXPORT int call_PyArray_DescrFromType(int typenum);
+  EIGENPY_DLLEXPORT PyArray_Descr * call_PyArray_DescrFromType(int typenum);
 
   EIGENPY_DLLEXPORT void call_PyArray_InitArrFuncs(PyArray_ArrFuncs * funcs);
 

src/numpy.cpp

@@ -39,7 +39,7 @@ namespace eigenpy
 
   PyTypeObject * getPyArrayType() { return &PyArray_Type; }
 
-  int call_PyArray_DescrFromType(int typenum)
+  PyArray_Descr * call_PyArray_DescrFromType(int typenum)
   {
     return PyArray_DescrFromType(typenum);
   }