fix(interpreter): avoid overflow when checking if mem limit reached

crates/interpreter/src/interpreter/shared_memory.rs

@@ -90,7 +90,7 @@ impl SharedMemory {
     #[cfg(feature = "memory_limit")]
     #[inline]
     pub fn limit_reached(&self, new_size: usize) -> bool {
-        (self.last_checkpoint + new_size) as u64 > self.memory_limit
+        self.last_checkpoint.saturating_add(new_size) as u64 > self.memory_limit
     }
 
     /// Prepares the shared memory for a new context.