Reset errno = 0 before parseWholeNumber calls and errno == ERANGE checks

src/asm/main.cpp

@@ -267,6 +267,7 @@ static void parseArg(int ch, char *arg) {
 	}
 
 	case 'r':
+		errno = 0;
 		if (std::optional<uint64_t> maxDepth = parseWholeNumber(arg); !maxDepth) {
 			fatal("Invalid argument for option '-r'");
 		} else if (errno == ERANGE) {

src/asm/opt.cpp

@@ -105,6 +105,7 @@ void opt_Parse(char const *s) {
 		break;
 
 	case 'r':
+		errno = 0;
 		if (std::optional<uint64_t> maxRecursionDepth = parseWholeNumber(s); !maxRecursionDepth) {
 			error("Invalid argument for option 'r'");
 		} else if (errno == ERANGE) {