Workaround const warning causing an error in C codegen output.
Workaround const warning causing an error in C codegen output.


Former-commit-id: 247d066a9b4356ec49224eb61a20c0e2c9e60a9b
Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide