Fixed bug in constant evaluation of abs for minimum negative values.
Fixed bug in constant evaluation of abs for minimum negative values.


Former-commit-id: 47411d957e82ecd8a3448ff18cf978327d388142
Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide