[MemoryMapper] Adds debug only GetPointer with size check.

Source/Interface/Memory/MemMapper.cpp

@@ -57,5 +57,20 @@ namespace FEXCore::Memory {
 
     return nullptr;
   }
+
+#ifndef NDEBUG
+  void *MemMapper::GetPointerSizeCheck(uint64_t Offset, uint64_t Size) {
+    for (auto const &Region : MappedRegions) {
+      if (Region.contains(Offset)) {
+        LogMan::Throw::A((Region.Offset + Region.Size) >= (Offset + Size), "Pointer in region but region isn't large enough. Needs 0x%lx more", Offset - Region.Offset + Size - Region.Size);
+        if ((Region.Offset + Region.Size) < (Offset + Size)) {
+          return reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(Region.Ptr) + (Offset - Region.Offset));
+        }
+      }
+    }
+    return nullptr;
+  }
+#endif
+
 }