Fix import_array() call when exporting numpy functionality

import_array() must be called when the numpy C-API is called.
This is a macro that in our case defined a return value that makes
the compiler complain. The added #define statement enforces no return value

modules/gfx/pymod/export_primlist.cc

@@ -137,6 +137,8 @@ namespace {
 void export_primlist()
 {
 #if OST_NUMPY_SUPPORT_ENABLED
+  // The following define enforces no return value when calling import_array
+  #define NUMPY_IMPORT_ARRAY_RETVAL
   import_array(); // magic handshake for numpy module
 #endif
 

modules/mol/base/pymod/export_editors.cc

@@ -227,6 +227,8 @@ void set_t_pos(XCSEditor& e, object o1, object o2)
 void export_Editors()
 {
 #if OST_NUMPY_SUPPORT_ENABLED
+  // The following define enforces no return value when calling import_array
+  #define NUMPY_IMPORT_ARRAY_RETVAL
   import_array();
 #endif
 

modules/mol/base/pymod/export_entity.cc

@@ -130,6 +130,8 @@ bool depr_is_transformation_identity(const EntityHandle& eh)
 void export_Entity()
 {
 #if OST_NUMPY_SUPPORT_ENABLED
+  // The following define enforces no return value when calling import_array
+  #define NUMPY_IMPORT_ARRAY_RETVAL
   import_array();
 #endif