type casting between u16 and i32 needed

[rebcabin]

we expected to be able to convert 32768, which is i32, into u16. please help

from lpython import u16, i32

i : i32
u : u16 = u16(32768)
x : i32

for i in range(i32(u)):
    x = i * 2

/Users/brian/CLionProjects/lpython/src/bin/python /Users/brian/CLionProjects/lpython/lasr/LP-pycharm/IssueCH152.py 
code generation error: Variable type not supported 1
 --> /Users/brian/CLionProjects/lpython/lasr/LP-pycharm/IssueCH152.py:4:1
  |
4 | u : u16 = u16(32768)
  | ^^^^^^^^^^^^^^^^^^^^ 


Note: if any of the above error or warning messages are not clear or are lacking
context please report it to us (we consider that a bug that must be fixed).

[Shaikh-Ubaid]

Team, I think this issue was already fixed in #2164.

[certik]

It's not clear if the casting has been implemented properly. I opened up a new issue for this: #2174