ITE expressions are not always eliminated

[wies]

Example:

procedure foo(x: Int, f: Map<Int, Map<Int, Int>>)
  requires forall i: Int, j: Int :: f[i][j] == (i < j ? 1 : 0)
  ensures false
{}

Error: unexpected expression at File "/home/siddharth/grasshopper/test.spl", line 2, columns 48-61
Raised at file "pervasives.ml", line 32, characters 17-33
Called from file "src/frontends/spl/splTranslator.ml", line 405, characters 21-43
Called from file "src/frontends/spl/splTranslator.ml", line 393, characters 17-45
Called from file "src/frontends/spl/splTranslator.ml", line 527, characters 16-43
Called from file "src/frontends/spl/splTranslator.ml", line 534, characters 14-40
Called from file "src/frontends/spl/splTranslator.ml", line 662, characters 12-67
Called from file "src/frontends/spl/splTranslator.ml", line 793, characters 24-83
Called from file "map.ml", line 315, characters 19-42
Called from file "src/frontends/spl/splTranslator.ml", line 791, characters 4-868
Called from file "src/frontends/spl/splTranslator.ml" (inlined), line 834, characters 2-13
Called from file "src/main/grasshopper.ml", line 119, characters 13-46
Called from file "src/main/grasshopper.ml", line 215, characters 18-62