fix windows build

Author: chobie

config.w32

@@ -1,6 +1,6 @@
 ARG_WITH('protocolbuffers', 'protocolbuffers extension', 'no');
 
 if (PHP_PROTOCOLBUFFERS != "no") {
-    EXTENSION("protocolbuffers", "protocolbuffers.c descriptor.c descriptor_builder.c field_descriptor.c message.c message_options.c enum.c enum_descriptor.c enum_value_descriptor.c enum_descriptor_builder.c php_message_options.c unknown_field.c unknown_field_set.c helper.c extension_registry.c core.c serializer.c");
+    EXTENSION("protocolbuffers", "protocolbuffers.c descriptor.c descriptor_builder.c field_descriptor.c message.c message_options.c enum.c enum_descriptor.c enum_value_descriptor.c enum_descriptor_builder.c php_message_options.c unknown_field.c unknown_field_set.c helper.c extension_registry.c core.c serializer.c json_serializer.c");
     ADD_EXTENSION_DEP('protocolbuffers','spl',true);
 }

protocolbuffers.c

@@ -74,7 +74,7 @@ zend_class_entry *php_protocol_buffers_uninitialized_message_exception_class_ent
 
 ZEND_DECLARE_MODULE_GLOBALS(protocolbuffers);
 
-static zend_class_entry *php_protocolbuffers_get_exception_base(TSRMLS_D)
+zend_class_entry *php_protocolbuffers_get_exception_base(TSRMLS_D)
 {
 #if (PHP_MAJOR_VERSION == 5) && (PHP_MINOR_VERSION < 2)
 	return zend_exception_get_default();

protocolbuffers.h

@@ -152,6 +152,8 @@ static const int64_t kLongMax = LONG_MAX;
 		} \
 	} while(0);
 
+zend_class_entry *php_protocolbuffers_get_exception_base(TSRMLS_D);
+
 typedef struct php_protocolbuffers_scheme
 {
 	int tag;