added argument type annotations and runtime checks. To do that new opcodes were created (PUSHTYP, PUSHTYPTYP, ERROR)

tests/suite/Testcase_011_004

@@ -0,0 +1,25 @@
+
+#source
+
+    fun add(a, b) {
+        return a + b;
+    }
+
+#bytecode
+    
+    PUSHFUN fun, 2;
+    ASS "add";
+    POP 1;
+    JUMP end;
+fun:
+    ASS "b";
+    POP 1;
+    ASS "a";
+    POP 1;
+    PUSHVAR "a";
+    PUSHVAR "b";
+    ADD;
+    RETURN 1;
+    RETURN 0;
+end:
+    RETURN 0;