fix testcase error when threads already allocated

Author: HenryHRich

test/gstack.ijs

@@ -121,8 +121,8 @@ assert. -. IF64  NB. threads should be supported on all 64-bit systems
 end.
 if. IF64 do.
 assert. (<@i."0 i. 5) -: (i. t. ''"0 i. 5)
-assert. 2 = 1 T. ''
-while. 2 ~: # 2 T. '' do. end.  NB. wait till threads become ready
+assert. 2 <: 1 T. ''
+while. 2 > # 2 T. '' do. end.  NB. wait till threads become ready
 assert. 1 2 *./@e. 2 T. ''
 assert. 0 1 2 *./@e. > (3&T.@'')@(6!:3) t.'' "(0)  0.1 0.1 0.3 
 assert. 0 1 2 *./@e. > (3&T.@'')@(6!:3) t.'' "(0)  0.3 0.3 0.1