more on gcc4 build fix

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22580 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/media/media-add-ons/mixer/MixerCore.h

@@ -12,6 +12,7 @@
 #include <TimeSource.h>
 
 class AudioMixer;
+class BBufferGroup;
 class MixerInput;
 class MixerOutput;
 class Resampler;

src/add-ons/print/drivers/preview/PrinterDriver.h

@@ -16,6 +16,8 @@
 #include <InterfaceKit.h>
 #include "InterfaceUtils.h"
 
+class BNode;
+
 #ifndef ROUND_UP
 	#define ROUND_UP(x, y) (((x) + (y) - 1) & ~((y) - 1))
 #endif

src/apps/codycam/CodyCam.h

@@ -16,6 +16,10 @@
 #include "Settings.h"
 #include"VideoConsumer.h"
 
+
+class BMediaRoster;
+
+
 enum {
 	msg_filename	= 'file',
 

src/apps/cortex/NodeManager/AddOnHost.cpp

@@ -1,5 +1,3 @@
-// AddOnHost.cpp
-
 #include "AddOnHost.h"
 #include "AddOnHostProtocol.h"
 
@@ -240,4 +238,3 @@ status_t AddOnHost::ReleaseInternalNode(
 	return (reply.FindInt32("error", &err) == B_OK) ? err : B_ERROR;
 }
 
-// END -- AddOnHost.cpp --

src/apps/deskbar/DeskBarUtils.h

@@ -37,6 +37,8 @@ All rights reserved.
 
 #include "tracker_private.h"
 
+class BFilePanel;
+
 enum {
 	msg_be_container
 };

src/apps/people/PeopleView.h

@@ -19,6 +19,7 @@
 #define NAME_V				 10
 #define STATE_WIDTH			175
 
+class BPopUpMenu;
 class TTextControl;
 
 

src/preferences/screensaver/ScreenSaverWindow.h

@@ -21,6 +21,7 @@
 #include <ListView.h>
 
 class BButton;
+class BTabView;
 
 class ModulesView;
 class ScreenCornerSelector;