Pwcond does not work with pools. Added a check to stop this case.

git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@4497 c92efa57-630b-4861-b058-cf58834340f0

PWCOND/do_cond.f90

@@ -19,6 +19,7 @@ SUBROUTINE do_cond(nodenumber)
   USE io_files 
   USE noncollin_module, ONLY : noncolin, i_cons
   USE io_global, ONLY : stdout, ionode, ionode_id
+  USE mp_global, ONLY : npool
   USE paw_onecenter,      ONLY : PAW_potential
   USE paw_variables,      ONLY : okpaw
 
@@ -130,6 +131,10 @@ SUBROUTINE do_cond(nodenumber)
      !
   END IF
 
+#ifdef __PARA
+   IF ( npool > 1 ) CALL errore('pwcond','pools not implemented',npool)
+#endif
+
 !
 ! ... Broadcast variables
 !