Profiler incorrectly times fixed-cost creep methods

[bencbartlett]

I've included relevant parts of a profiler output. The profiler incorrectly records some functions which have a constant cost, shown below. I wrap creep methods as Zerg methods, and in my codebase, most creep action methods are called from a Task, which checks if the action can be performed before calling task.work(). So Task.harvest should have a CPU cost of at least 0.2; many actions which are wrapped in tasks seem to have half of what should be a reasonable CPU value.

Function                                       Tot Calls    CPU/Call  Calls/Tick    CPU/Tick   % of Tot
Overmind:run                                      335715     41.62ms        0.80     33.10ms       14 %
Colony:run                                       3006714      4.65ms        7.12     33.08ms       14 %
Zerg:run                                        70101391      0.12ms      166.04     20.63ms        9 %
Zerg:travelTo                                   24035267      0.16ms       56.93      8.97ms        4 %
TaskHarvest:work                                20646410      0.10ms       48.90      5.13ms        2 %
Zerg:harvest                                    20646410      0.10ms       48.90      5.00ms        2 %
TaskUpgrade:work                                 7679019      0.11ms       18.19      2.03ms        1 %
Zerg:upgradeController                           7679019      0.11ms       18.19      1.98ms        1 %
Zerg:repair                                      4812858      0.12ms       11.40      1.34ms        1 %
TaskDeposit:work                                 3601144      0.13ms        8.53      1.12ms        0 %
Zerg:transfer                                    3601144      0.13ms        8.53      1.09ms        0 %
TaskReserve:work                                 3932616      0.11ms        9.31      1.04ms        0 %
Zerg:reserveController                           3932616      0.11ms        9.31      1.01ms        0 %
TaskRepair:work                                  2154481      0.11ms        5.10      0.54ms        0 %
Zerg:withdraw                                    3342131      0.05ms        7.92      0.40ms        0 %
TaskBuild:work                                    232708      0.16ms        0.55      0.09ms        0 %
Zerg:build                                        232708      0.16ms        0.55      0.09ms        0 %
Zerg:move                                         158493      0.11ms        0.38      0.04ms        0 %
Zerg:pickup                                       612382      0.02ms        1.45      0.03ms        0 %
Zerg:heal                                          38356      0.22ms        0.09      0.02ms        0 %
Zerg:dismantle                                      9091      0.22ms        0.02      0.00ms        0 %
Zerg:attack                                         5967      0.21ms        0.01      0.00ms        0 %
Zerg:suicide                                        3564      0.23ms        0.01      0.00ms        0 %
Zerg:rangedHeal                                     3120      0.25ms        0.01      0.00ms        0 %

422201 total ticks measured			240.88 average CPU profiled per tick

[ricochet1k]

If the harvest call fails, it shouldn't use the fixed 0.2 CPU intent cost.