Fix jit_empty_cache, also clear wasm table

src/cpu.js

@@ -1470,6 +1470,13 @@ CPU.prototype.diverged = function () {
 CPU.prototype.jit_empty_cache = function()
 {
     this.wm.exports["_jit_empty_cache"]();
+
+    const table = this.wm.imports["env"].table;
+
+    for(let i = 0; i < WASM_TABLE_SIZE; i++)
+    {
+        table.set(i, null);
+    }
 };
 
 CPU.prototype.call_interrupt_vector = function(interrupt_nr, is_software_int, has_error_code, error_code)

src/native/memory.c

@@ -63,10 +63,9 @@ void jit_dirty_cache_small(uint32_t start_addr, uint32_t end_addr)
 
 void jit_empty_cache()
 {
-    assert(false); // XXX: is WASM_TABLE_SIZE correct?
-    for(uint32_t i = 0; i < WASM_TABLE_SIZE; i++)
+    for(int32_t i = 0; i < WASM_TABLE_SIZE; i++)
     {
-        group_dirtiness[i]++;
+        jit_cache_arr[i].start_addr = 0;
     }
 }