fixes for Emscripten, and for compiling without tutorial

hyperweb.cpp

@@ -5,6 +5,7 @@
 #define NOGFX
 #define NOPNG
 #define DEMO
+#define TOUR
 
 #ifdef FAKEWEB
 void mainloopiter();
@@ -17,6 +18,8 @@ void initweb();
 
 void loadCompressedChar(int &otwidth, int &otheight, int *tpix);
 
+const char *wheresounds;
+
 #include "hyper.cpp"
 
 void playSound(cell *c, const string& fname, int vol) { }