Bad result on cases cfe/004/F2 and cfe/007/E5. Regress,linux.

#cfe/004/F2:
restore Attachment 2 (RLE) cyl
restore Attachment 1 (RLE) cont
mkplane cont cont
nexplode cyl F
ttranslate cont 0 200 0
featdprism cyl cont cont 10 1 1
featperformval dprism result 55 cyl_3

#cfe/007/D5:
pcylinder c1 2 5
profile p x 1 y 1 x -1 y -1
trotate p 0 0 0 1 0 0 90
trotate p 0 0 0 0 0 1 90
ttranslate p 0 -3 0.5
explode c1 f
featrevol c1 p p 0 0 0.5 0 0 1 1 1
featperformval revol result 360