This patch enables detection of conflicting external tags when compiling
under Ada 2005 mode. Required since this AI is a binding interpretation.

Tested on x86_64-pc-linux-gnu, committed on trunk

2011-08-02  Javier Miranda  <miranda@adacore.com>

	* exp_disp.adb (Make_DT): Generate call to Check_TSD in Ada 2005 mode.