Fix a compilation error because of c_char#15

lum1n0us merged 1 commit intobytecodealliance:mainbytecodealliance/wamr-rust-sdk:mainfrom

lum1n0us:fix/compiling_error_for_c_charlum1n0us/wamr-rust-sdk:fix/compiling_error_for_c_charCopy head branch name to clipboard