fixed disappearing returns

[XdotCore]

Description

This fixes issue #1456 caused by pr #1191. This issue occurred because the pr would remove any exit instruction that wasn't followed by an operation starting with push int, which removed simple return;s that didn't meet that req because they compile to exit (while return value; compiles to ret). Thanks to @Jacky720 for a better way than my initial solution in #1680

Caveats

Haven't done proper testing

Notes

N/A

[Jacky720]

This also resolves #1223 (and maybe some more, we have a big issues backlog).

[Miepee]

Can someone test this please?

[Dobby233Liu]

Can someone test this please?

Scuffed test

Before PR: https://github.com/krzys-h/UndertaleModTool/commit/4cb37e67c8b9f5428958dadb332efdff7b540317 After PR: https://github.com/Dobby233Liu/UndertaleModTool/commit/fc119135b58e6c7a72d2e4c093c7a0c5f4a31d4a

In DR Ch 1&2 v1.10 (2022.1),

1. Open gml_GlobalScript_scr_create_hitbox_solid, insert right after start of body

   if global.darkzone != 1 return;
   

   • Before PR: compiles to

     f ((global.darkzone != true))
     {
     }
     

   • After PR: compiles to

     if ((global.darkzone != true))
         return;
     

2. Open gml_Object_o_boxingflame_Create_0, insert before line 1

   if (instance_exists(o_boxingqueen) == 0) return;
   

   • Before PR: compiles to

     f ((instance_exists(o_boxingqueen) == 0))
     return;
     

   • After PR: compiles to

     f ((instance_exists(o_boxingqueen) == 0))
        return;
     

With ULCA Deltarune skit program which is 2023.1 ,

1. Open gml_Object_obj_event_anxietyrealized_Create_0, and insert before line 1

   if global.chapter != 3 { exit; }
   

   • Before PR: compiles to

     if ((global.chapter != 3))
         return;
     

   • After PR: compiles to

     if ((global.chapter != 3))
         return;
     

2. Open gml_GlobalScript_scr_mercyadd, insert right after start of body

   if !global.darkzone exit;
   

   • Before PR: compiles to

     if (!global.darkzone)
         return;
     

   • After PR: compiles to

     if (!global.darkzone)
        return;
     

[Miepee]

ty, probably is good then