nan [was: grftest failure]

[Clint Adams]

> modify t.frame so it doesn't delete the output directories and then compare 
> the t.grftest runs.

checks is from make check, and grftest is run manually.

--- checks.10032.20030105T133701/tests/grftest.out	2003-01-05 13:37:44.000000000 -0500
+++ grftest.20030105/tests/grftest.out	2003-01-05 13:30:41.000000000 -0500
@@ -1,9 +1,9 @@
 id     graham       robinson     fisher       tristate  
- 1   S 1.000000   S 0.613817   S 1.000000   u 0.500000
- 2   S 1.000000   S 0.685438   S 1.000000   S 9.40e-03
- 3   S 1.000000   S 0.671075   S 1.000000   S 1.72e-05
- 4   S 1.000000   S 0.671587   S 1.000000   S 1.47e-07
- 5   S 1.000000   S 0.703862   S 1.000000   S 0.00e+00
- 6   S 1.000000   S 0.686800   S 1.000000   S 7.75e-12
- 7   S 1.000000   S 0.739067   S 1.000000   S 0.00e+00
- 8   S 1.000000   S 0.736257   S 1.000000   S 0.00e+00
+ 1   S 1.000000   h 0.538130   h 0.500000   u 0.500000
+ 2   S 1.000000   S 0.625327   S 0.990601   S 9.40e-03
+ 3   S 1.000000   S 0.640989   S 0.999983   S 1.72e-05
+ 4   S 1.000000   S 0.694330   S 1.000000   S 1.47e-07
+ 5   S 1.000000   S 0.723848   S 1.000000   S 0.00e+00
+ 6   S 1.000000   S 0.690170   S 1.000000   S 7.75e-12
+ 7   S 1.000000   S 0.745375   S 1.000000   S 0.00e+00
+ 8   S 1.000000   S 0.784853   S 1.000000   S 0.00e+00