`_option_` functions are used on non-option types in cgen

[XiaoPangxie732]

Describe the bug

_option_ functions are used on non-option types in cgen

Reproduction Steps

fn main() {
    some_func2(1)?
}

fn some_func() ?string {
    return 'a'
}

fn some_func2(i int) ?string {
    return match i {
        1 {
            x := if true { 'b' } else { some_func()? }
            println(x)
            'b'
        }
        else { none }
    }
}

Expected Behavior

b

Current Behavior

println(NIL)

Possible Solution

No response

Additional Information/Context

This C code is generated for the above code:

string _t3; /* if prepend */
if (true) {
	_option_ok(&(string[]) { _SLIT("b") }, (_option*)(&_t3), sizeof(string));
} else {
	_option_string _t4 = main__some_func();
	if (_t4.state != 0) {
		_option_string _t5;
		memcpy(&_t5, &_t4, sizeof(_option));
		return _t5;
	}
	
 	_option_ok(&(string[]) { (*(string*)_t4.data) }, (_option*)(&_t3), sizeof(string));
}

_t3 here is of type string, is passed to _option_ok, which only accepts option types

V version

V 0.4.10 e968139

Environment details (OS name and version, etc.)

V full version	V 0.4.10 725e259.e968139
OS	windows, Microsoft Windows 11 Pro 26100 64-bit
Processor	12 cpus, 64bit, little endian, Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
Memory	2.44GB/15.86GB
V executable	E:\Programs\v\v.exe
V last modified time	2025-03-25 18:45:38
V home dir	OK, value: E:\Programs\v
VMODULES	OK, value: C:\Users***.vmodules
VTMP	OK, value: C:\Users***\AppData\Local\Temp\v_0
Current working dir	OK, value: ***
Git version	git version 2.38.1.windows.1
V git status	0.4.10-39-ge9681394
.git/config present	true
cc version	N/A
gcc version	N/A
clang version	N/A
msvc version	N/A
tcc version	tcc version 0.9.27 (x86_64 Windows)
tcc git status	thirdparty-windows-amd64 b425ac82
emcc version	N/A
glibc version	N/A

Note

You can use the 👍 reaction to increase the issue's priority for developers.

Please note that only the 👍 reaction to the issue itself counts as a vote.
Other reactions and those to comments will not be taken into account.

[huly-for-github]

Connected to Huly®: V_0.6-22438