Merge pull request Tencent#1506 from ylavic/CreatePattern

Add missing curly brackets in STDREGEX's CreatePattern().

Author: miloyip

include/rapidjson/schema.h

@@ -1149,14 +1149,15 @@ class Schema {
 #elif RAPIDJSON_SCHEMA_USE_STDREGEX
     template <typename ValueType>
     RegexType* CreatePattern(const ValueType& value) {
-        if (value.IsString())
+        if (value.IsString()) {
             RegexType *r = static_cast<RegexType*>(allocator_->Malloc(sizeof(RegexType)));
             try {
                 return new (r) RegexType(value.GetString(), std::size_t(value.GetStringLength()), std::regex_constants::ECMAScript);
             }
             catch (const std::regex_error&) {
                 AllocatorType::Free(r);
             }
+        }
         return 0;
     }