Remove s_mstruct_changed issue in qs_force.F when calculating RI-MP2 gradients.
Added a warning to avoid the usage of SCREEN_ON_INITIAL_P in RI-MP2 gradients calculation.


git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14853 bac0169d-1eea-4375-b5f6-f89d2ced9994