Malone would get the vet minimum salary of $1.1 mil, prorated for however many games are left in the season.
Also of note is the following...
http://members.cox.net/lmcoon/salarycap.htm#9
Quote:
One interesting thing about minimum-salary contracts is that for certain players, the league office actually pays part of their salary. This happens with players who have been in the NBA for five or more seasons and are playing under a one-year, ten-day or rest-of-season contract at the minimum salary. In these cases, the team pays the player at the minimum salary level for a four-year veteran, and the league pays the remainder. For example, in 99-00 the minimum salary for a four-year veteran is $510,000, so a ten-year veteran, with a minimum salary of $1,000,000, would be paid $510,000 by his team and $490,000 by the league. Only the four-year minimum is included in the team salary, not the player's full salary. The reason for doing this is so teams won't shy away from signing older veterans simply because they are more expensive.
So Malone would cost the Spurs less than probably everyone else on the roster. The horror.