Fix some compilation issues

Author: jhawthorn

ext/rapidjson/buffer.hh

@@ -41,7 +41,7 @@ class RubyStringBuffer {
             capacity = newcap;
         }
 
-        const size_t INITIAL_SIZE = 2048;
+        static const size_t INITIAL_SIZE = 2048;
 
         VALUE ruby_string;
 

ext/rapidjson/cext.cc

@@ -19,12 +19,12 @@ using namespace rapidjson;
 typedef RubyStringBuffer DefaultBuffer;
 
 VALUE encode(VALUE _self, VALUE obj) {
-    RubyObjectEncoder<DefaultBuffer, Writer<DefaultBuffer>> encoder;
+    RubyObjectEncoder<DefaultBuffer, Writer<DefaultBuffer> > encoder;
     return encoder.encode(obj);
 }
 
 VALUE pretty_encode(VALUE _self, VALUE obj) {
-    RubyObjectEncoder<DefaultBuffer, PrettyWriter<DefaultBuffer>> encoder;
+    RubyObjectEncoder<DefaultBuffer, PrettyWriter<DefaultBuffer> > encoder;
     return encoder.encode(obj);
 }
 

ext/rapidjson/encoder.hh

@@ -5,7 +5,7 @@
 
 using namespace rapidjson;
 
-template <typename B = RubyStringBuffer, typename W=Writer<B>>
+template <typename B = RubyStringBuffer, typename W=Writer<B> >
 class RubyObjectEncoder {
     B buf;
     W writer;

ext/rapidjson/parser.hh

@@ -8,14 +8,16 @@ using namespace rapidjson;
 
 class NullHandler : public BaseReaderHandler<UTF8<>, NullHandler> {
     static const int MAX_DEPTH = 256;
-    int depth = 0;
+    int depth;
     bool push() {
         return depth++ < MAX_DEPTH;
     }
     bool pop() {
         return depth-- > 0;
     }
     public:
+    NullHandler(): depth(0) {
+    }
     bool StartObject() { return push(); }
     bool EndObject(SizeType s) { return pop(); }
     bool StartArray() { return push(); }