Minor -Wall warning fixes, expanded a comment

stream/clients/ogre_datastream.hpp

@@ -32,7 +32,7 @@ class Mangle2OgreStream : public Ogre::DataStream
 
   /// Constructor for a named data stream
   Mangle2OgreStream(const Ogre::String &name, StreamPtr _inp)
-    : inp(_inp), Ogre::DataStream(name) { init(); }
+    : Ogre::DataStream(name), inp(_inp) { init(); }
 
   // Only implement the DataStream functions we have to implement
 

stream/filters/buffer_stream.hpp

@@ -37,7 +37,7 @@ class BufferStream : public MemoryStream
         {
           // We DON'T know how big the stream is. We'll have to read
           // it in increments.
-          const int ADD = 32*1024;
+          const unsigned int ADD = 32*1024;
           size_t len=0, newlen;
 
           while(!input->eof())

tools/str_exception.hpp

@@ -4,7 +4,13 @@
 #include <exception>
 #include <string>
 
-/// A simple exception that takes and holds a string
+/** @brief A simple exception that takes and holds a string
+
+    Usage:
+
+      throw str_exception("message");
+
+ */
 class str_exception : public std::exception
 {
   std::string msg;