small fix

build_wasm.sh

@@ -0,0 +1,3 @@
+rm -rf build/wasm/
+mkdir -p build/wasm/
+emcc src/main.cpp -fexceptions -o build/wasm/index.html

src/iter.h

@@ -20,7 +20,7 @@ public:
         }
     }
 
-    PyVar next();
+    PyVar next() override;
 };
 
 class VectorIterator : public _Iterator {