Fix ptrcall passing invalid size int.

binding_generator.py

@@ -541,6 +541,8 @@ def generate_icall_header(icalls):
             
             if is_core_type(arg):
                 method_signature += arg + "&"
+            elif arg == "int":
+                method_signature += "int64_t "
             elif arg == "float":
                 method_signature += "double "
             elif is_primitive(arg):
@@ -594,6 +596,8 @@ def generate_icall_implementation(icalls):
             
             if is_core_type(arg):
                 method_signature += arg + "& "
+            elif arg == "int":
+                method_signature += "int64_t "
             elif arg == "float":
                 method_signature += "double "
             elif is_primitive(arg):