RFC PR31162 missing warning for real do-loops with implicit typed variables

[Jerry DeLisle]

Hi all,

This PR is a bit mis-stated.  The problem here is that we are not giving any 
warnings if the START, END, or STEP expressions of the DO LOOP are real.

I have a patch that fixes this by giving these warnings.

My question is:  Should gfortran issue warnings regardless of flags except the 
usual -w mechanism or only warn if -std=f95, -std=f2003, or -pedantic.

IFORT only warns if -stand f95 as an example, otherwise it accepts real values 
and loop variables.

Right now gfortran warns "always" if the loop variable is real.

The implementation difference will be to either use GFC_STD_F95_DEL or 
GFC_STD_F95_OBS. (I am using gfc_notify_std)

Comments please.

Jerry