Revision 346

Rename block to `my_block` in procedure `CLOUDS_GNO` because block is
a Fortran keyword.

Remove computation of palpbla in procedure sw. It was not used nor
output. (Not used nor output either in LMDZ.)

In procedure physiq, define `d_[uv]_con` and add them to `[uv]_seri`
only if `conv_Emanuel`. Thus, we do not need to initialize
`d_[uv]_con` to 0, we do not have to save them and we do not add 0 to
`[uv]_seri`.

In procedure physiq, no need to initialize rnebcon to 0, it is defined
by phyetat0 afterwards.

Check that `iflag_cldcon` is between - 2 and 3.