fix: correct a compiler error that could lead to Argon crashing during program execution

Author: jacopodl

argon/lang/compiler2/transl_unit.cpp

@@ -293,7 +293,6 @@ void TranslationUnit::Emit(vm::OpCode op, int arg, BasicBlock *dest, const scann
         case vm::OpCode::MKSTRUCT:
         case vm::OpCode::MKTP:
         case vm::OpCode::MKTRAIT:
-        case vm::OpCode::POPGT:
             this->DecrementStack(arg);
             break;
         default:

argon/vm/opcode.h

@@ -110,7 +110,7 @@ namespace argon::vm {
     constexpr short StackChange[] = {
             -1,
             0,
-            1,
+            0,
             -1,
             -1,
             0,
@@ -186,7 +186,7 @@ namespace argon::vm {
             -1,
             -1,
             0,
-            1,
+            0,
             -2,
             -1,
             0,