Tim_one's change to aggressively overallocate nodes when adding child

nodes (in Parser/node.c) resolves the gross memory consumption
exhibited by the EMX runtime on OS/2, so the test should be exercised
on this platform.

Lib/test/test_longexp.py

-# this test has a malloc problem on OS/2+EMX, so skip test in that environment
-
-import sys
-from test_support import TestFailed, TestSkipped
 
 REPS = 65580
 
-if sys.platform == "os2emx":
-    raise TestFailed, "OS/2+EMX port has malloc problems with long expressions"
-else:
-    l = eval("[" + "2," * REPS + "]")
-    print len(l)
+l = eval("[" + "2," * REPS + "]")
+print len(l)