Revert "misc: chore: Remove redundant code"

This reverts commit 05a88ccc94.

src/ARMeilleure/Translation/Cache/CacheEntry.cs

@@ -18,7 +18,7 @@ namespace ARMeilleure.Translation.Cache
             UnwindInfo = unwindInfo;
         }
 
-        public int CompareTo(CacheEntry other)
+        public int CompareTo([AllowNull] CacheEntry other)
         {
             return Offset.CompareTo(other.Offset);
         }

src/ARMeilleure/Translation/Cache/CacheMemoryAllocator.cs

@@ -17,7 +17,7 @@ namespace ARMeilleure.Translation.Cache
                 Size = size;
             }
 
-            public int CompareTo(MemoryBlock other)
+            public int CompareTo([AllowNull] MemoryBlock other)
             {
                 return Offset.CompareTo(other.Offset);
             }

src/ARMeilleure/Translation/Cache/JitCache.cs

@@ -32,7 +32,7 @@ namespace ARMeilleure.Translation.Cache
         private static bool _initialized;
 
         private static readonly List<ReservedRegion> _jitRegions = [];
-        private static int _activeRegionIndex;
+        private static int _activeRegionIndex = 0;
 
         [SupportedOSPlatform("windows")]
         [LibraryImport("kernel32.dll", SetLastError = true)]

src/ARMeilleure/Translation/Cache/JitUnwindWindows.cs

@@ -79,7 +79,7 @@ namespace ARMeilleure.Translation.Cache
 
                 _unwindInfo = (UnwindInfo*)(workBufferPtr + _sizeOfRuntimeFunction);
 
-                _getRuntimeFunctionCallback = FunctionTableHandler;
+                _getRuntimeFunctionCallback = new GetRuntimeFunctionCallback(FunctionTableHandler);
 
                 result = RtlInstallFunctionTableCallback(
                     codeCachePtr | 3,
@@ -102,7 +102,10 @@ namespace ARMeilleure.Translation.Cache
 
             bool result;
 
-            result = RtlDeleteFunctionTable(codeCachePtr | 3);
+            unsafe
+            {
+                result = RtlDeleteFunctionTable(codeCachePtr | 3);
+            }
 
             if (!result)
             {