Export get_bytes_per_row() from InterfacePrivate.h, and use it in ServerBitmap

in place of the own rolled implementation. Comment typo fix.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31757 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/interface/InterfacePrivate.h

@@ -9,6 +9,7 @@
 #define _INTERFACE_PRIVATE_H
 
 
+#include <GraphicsDefs.h>
 #include <SupportDefs.h>
 
 
@@ -17,6 +18,11 @@ namespace BPrivate {
 bool		get_mode_parameter(uint32 mode, int32& width, int32& height,
 				uint32& colorSpace);
 
+
+int32		get_bytes_per_row(color_space colorSpace, int32 width);
+
+
+
 }	// namespace BPrivate