Fails to deduce generic type when spawning a thread inside a generic function

[CG-SS]

Describe the bug

It appers the C generation fails when a generic function tries to spawn a thread for another generic function with a channel.

Reproduction Steps

Run the program:

module main

struct In[T] {
	source chan T
}

fn emit[T](s In[T], ar []T) {
	for _, i in ar {
		s.source <- i
	}
}

fn from[T](ar []T) In[T] {
	s := In[T]{}

	spawn emit(s, ar)

	return s
}

fn (i In[T]) get() T {
	return <-i.source
}

fn main() {
	v := from[int]([1]).get()

	println(v)
}

Expected Behavior

Should print 1.

Current Behavior

================== C compilation error (from tcc): ==============
cc: c:/users/erlin/v/thirdparty/tcc/include/winapi/synchapi.h:167: warning: CreateMutex redefined
cc: C:/Users/erlin/AppData/Local/Temp/v_0/main.exe.01J9WN0TA44PBED7GV3X6K2MF6.tmp.c:2075: error: 'T' undeclared
... (the original output was 9 lines long, and was truncated to 2 lines)
=================================================================
(You can pass `-cg`, or `-show-c-output` as well, to print all the C error messages).
builder error: 
==================
C error found. It should never happen, when compiling pure V code.

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.8 18eee34.2ca3fdf

Environment details (OS name and version, etc.)

V full version: V 0.4.8 18eee34.2ca3fdf
OS: windows, Microsoft Windows 11 Pro v22631 64-bit
Processor: 32 cpus, 64bit, little endian

Git version: git version 2.42.0.windows.2
Git vroot status: 0.4.8-87-g2ca3fdfa-dirty
.git/config present: true

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