fix bug

Author: iainchen

MangoFix.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
 s.name         = "MangoFix"
-s.version      = "1.5.0"
+s.version      = "1.5.1"
 s.summary      = "MangoFix"
 s.description  = <<-DESC
   Mango is a DSL which syntax is very similar to Objective-C，Mango is also an iOS  App hotfix SDK. You can use Mango method replace any Objective-C method.

MangoFix/Util/util.m

@@ -12,10 +12,17 @@
 #import "runenv.h"
 
 
-
 static ffi_type *_ffi_type_with_type_encoding(NSString *typeEncoding){
 	char *code = (char *)typeEncoding.UTF8String;
 	switch (code[0]) {
+        case 'r':
+        case 'R':
+        case 'n':
+        case 'N':
+        case 'o':
+        case 'O':
+        case 'V':
+            return _ffi_type_with_type_encoding(@(&code[1]));
 		case 'v':
 			return &ffi_type_void;
 		case 'c':