[XC] fix excessive boxing

[StephaneDelcroix]

Description of Change

a wrong test in some of the case was generating slightly invalid IL, that happened to crash on certain runtimes

Issues Fixed

• fixes Local resources not working in release configuration with more than one resource inside #26206

[mattleibow]

I might be missing it, but the code here looks equivalent? Instead of casting twice, you use a previous result and things like that...

What is the difference in behaviour with the before and after?

If this was a code cleanup, then it looks close. But supposedly this fixes an issue so something has changed with the behaviour?

[StephaneDelcroix]

What is the difference in behaviour with the before and after?

before

	.locals /* 11000008 */ init (
...
		[6] float64
	)
...
	IL_0088: ldc.r8 25
	IL_0091: box [System.Runtime]System.Double /* 0100004A */
	IL_0096: stloc.s 6

this IL box before storing to a value type variable, which is wrong, the code decompiles with //IL_0098: Expected F8, but got O

after

	IL_0001: ldc.r8 25
	IL_000a: stloc.s 6

and no decompilation error