fix compile errors

example/schemavalidator/schemavalidator.cpp

@@ -2,6 +2,8 @@
 
 // The example validates JSON text from stdin with a JSON schema specified in the argument.
 
+#define RAPIDJSON_HAS_STDSTRING 1
+
 #include "rapidjson/error/en.h"
 #include "rapidjson/filereadstream.h"
 #include "rapidjson/schema.h"

include/rapidjson/schema.h

@@ -2118,7 +2118,7 @@ private:
     SchemaType* typeless_;
     internal::Stack<Allocator> schemaMap_;  // Stores created Pointer -> Schemas
     internal::Stack<Allocator> schemaRef_;  // Stores Pointer(s) from $ref(s) until resolved
-    SValue uri_;
+    SValue uri_;                            // Schema document URI
 };
 
 //! GenericSchemaDocument using Value type.

test/unittest/schematest.cpp

@@ -2136,7 +2136,7 @@ public:
 
     virtual const SchemaDocumentType* GetRemoteDocument(const char* uri, SizeType length) {
         for (size_t i = 0; i < kCount; i++)
-            if (typename SchemaDocumentType::SType(uri, length) == sd_[i]->GetURI())
+            if (typename SchemaDocumentType::SValue(uri, length) == sd_[i]->GetURI())
                 return sd_[i];
         return 0;
     }