AcceptEntityInput 64bit fix

[bottiger1]

Fixes AcceptEntityInput by using the struct definition instead of messy pointer math.

I could not add variant_t.cpp from the sdk because including cbase.h causes a large number of compile errors so I just pasted the 1 method into the sdktools file. If anyone wants to play around with making it work, you can uncomment the file include in the AMBuildScript file in the sdktools folder.

Includes a fix to bintools from malifox which is supposedly related, but I have no idea what it does to be honest.

#2119

I only tested and confirmed this works on Linux and only on int and string variants.

[Kenzzer]

Thank you for continuing PR. Looks like this is going to require some fixing on the hl2sdks before the CI can pass.

Edit: Editing the AMBuild file of sdktools to suppress the warning-error, could also work.

[bottiger1]

It looks like the problem with the CI is because it is not finding variant_t.h from the SDK for some reason.

-I /home/runner/work/sourcemod/sourcemod/dependencies/hl2sdk-episode1/game/server 
-I /home/runner/work/sourcemod/sourcemod/dependencies/hl2sdk-episode1/game/shared 

-MD -MF inputnatives.d -c /home/runner/work/sourcemod/sourcemod/sourcemod/extensions/sdktools/inputnatives.cpp -o inputnatives.o
/home/runner/work/sourcemod/sourcemod/sourcemod/extensions/sdktools/variant-t.h:35:10: fatal error: 'variant_t.h' file not found

The include output looks correct except for the fact that game/shared doesn't exist in episode1, it is called game_shared, However game/server/variant_t.h does exist but the compiler says it still can't be found.

https://github.com/alliedmodders/hl2sdk/blob/78dab58646d5983c77af44c45a877b89196eb82c/game/server/variant_t.h

I'm going to chalk this up to a CI or ambuild problem.

[bottiger1]

I think I fixed episode1, but now it is complaining about the SDK. So I believe it's up to @psychonic whether we ignore this error or edit all the SDKs. I think I've done all I can here. Strangely I don't get this error when I compile.

/home/runner/work/sourcemod/sourcemod/dependencies/hl2sdk-csgo/game/server/variant_t.h:42:16: error: field 'fieldType' will be initialized after field 'iVal' [-Werror,-Wreorder-ctor]
        variant_t() : fieldType(FIELD_VOID), iVal(0) {}
                      ^~~~~~~~~~~~~~~~~~~~~  ~~~~~~~
                      iVal(0)                fieldType(FIELD_VOID)

[psychonic]

So I believe it's up to @psychonic whether we ignore this error or edit all the SDKs. I think I've done all I can here. Strangely I don't get this error when I compile.

/home/runner/work/sourcemod/sourcemod/dependencies/hl2sdk-csgo/game/server/variant_t.h:42:16: error: field 'fieldType' will be initialized after field 'iVal' [-Werror,-Wreorder-ctor]
        variant_t() : fieldType(FIELD_VOID), iVal(0) {}
                      ^~~~~~~~~~~~~~~~~~~~~  ~~~~~~~
                      iVal(0)                fieldType(FIELD_VOID)

I've now updated the SDK branches that had the bad initialization order.

[psychonic]

Thanks for tackling the rest of this