Update write_data.c for binary output when OUTPUT_FORCE=TRUE

[lizaclark]

dmy structure is NULL if OUTPUT_FORCE option is TRUE; thus, dmy->year, etc. cannot be accessed in write_data.c

[jhamman]

The question I have is why is dmy null. It should have been populated when mtclim was being run...?

[lizaclark]

dmy isn't passed to write_forcing_file.c, so write_forcing_file.c creates a dummy_dmy = NULL; to pass into write_data.c (the program that feeds atmos_data_struct variables to out_data_struct), presumably because VIC doesn't write the time when writing forcing output.

[jhamman]

I'm fine with merging this. Since we're pretty close to the VIC 5 release, I'd like to hold off on releasing 4.2.d until just before we release 5.0. 4.2.d will then be the basis for the VIC 4 support branch.

[bartnijssen]

@jhamman : OK - so I will leave this one open for you to merge

[jhamman]

Thanks @lizaclark!