Negate Blueprint Macro Returning Original Value

The Negate blueprint macros (NegateInt, NegateFloat) are returning the original value.

Found in 4.12.5 CL 3039270.

Reproduced in 4.13 CL 3106830 and 4.11.2 CL 2946394.

1. Open the editor
2. Create a new actor blueprint
3. Create an integer variable and set it to 2
4. On begin play, add a NegateInt node
5. Plug your integer variable into the input pin
6. Print the output of the NegateInt node using a print string

Result: The value 2 will be printed

Expected: The printed value would be negative