fixed: friend keyword should be used with a type name like 'class'

git-svn-id: svn://ttmath.org/publicrep/pikotools/trunk@423 e52654a7-88a9-db11-a3e9-0013d4bc506e

membuffer/membuffer.h

@@ -74,7 +74,7 @@ public:
 		size_t dynamic_array_index;
 		size_t index;
 
-		friend MemBuffer;
+		friend class MemBuffer;
 	};
 
 
@@ -99,7 +99,7 @@ public:
 		size_t dynamic_array_index;
 		size_t index;
 
-		friend MemBuffer;
+		friend class MemBuffer;
 	};