Fix french assert.

Fixes a possible ASSERT(!(need_new_run && !mYieldEngine &&
sub_state_r->run_state == run_state)).

When over all multiplex_impl functions and this is the only case that I
found where it could return without changing the state and without
calling either idle() or yield().

indra/newview/statemachine/aifilepicker.cpp

@@ -420,6 +420,7 @@ void AIFilePicker::multiplex_impl(state_type run_state)
 			// Store folder of first filename as context.
 			AIFilePicker::store_folder(mContext, getFolder());
 			finish();
+			break;
 		}
 	}
 }