Documented modification of dest_rect when blitting

CHANGELOG

@@ -15,6 +15,7 @@ Revision history for Perl extension SDL_perl.
 	- SDLx::Surface: added methods draw_trigon, draw_ellipse, draw_arc and draw_bezier [jtpalmer]
 	Bug fixes:
 	- SDLx::Rect: fixed methods copy, move and inflate [jtpalmer]
+	- SDLx::Surface: minor documentation update
 
 * 2.534_01 June 13 2011
 	- Using 'perl' instead of 'SDLPerl' to run silent tests on darwin [FROGGS]

lib/pods/SDLx/Surface.pod

@@ -121,6 +121,8 @@ Blits C<SDLx::Surface> onto $dest surface.
 $src_rect or $dest_rect are optional. If $src_rect is ommited, it will be the size of the entire surface. If $dest_rect is ommited, 
 it will be blitted at C<(0, 0)>. $src_rect or $dest_rect can be array refs or C<SDL::Rect>. $dest can be C<SDLx::Surface> or C<SDL::Surface>.
 
+Note that the final blit rectangle is stored in $dest_rect after clipping is performed.
+
 Returns $self
 
 =head2 blit_by
@@ -130,6 +132,8 @@ Returns $self
 Does the same as C<blit> but the C<SDLx::Surface> is the one being blitted to.
 This is useful when the surface you have isn't an C<SDLx::Surface>, but the surface it is being blitted to is.
 
+Note that the final blit rectangle is stored in $dest_rect after clipping is performed.
+
 =head2 flip
 
 Applies L<SDL::Video::flip|SDL::Video/"flip"> to the Surface, with error checking.