Modifications to snow_density: 1. Modified the checks on delta_depth so that the condition is delta_depth > MAX_CHANGE*depth. 2. Modified compression due to aging to only be calculated if depth > 0.
Modifications to snow_density:
1. Modified the checks on delta_depth so that the condition is delta_depth > MAX_CHANGE*depth.
2. Modified compression due to aging to only be calculated if depth > 0.

UW-Hydro/VIC,UW-Hydro/VIC,UW-Hydro/VIC