Update Custom arrow images.

* images/custom/down.xpm, images/custom/right.xpm: Update images
to increase contrast on bright backgrounds.

etc/ChangeLog

+2010-03-12  Chong Yidong  <cyd@stupidchicken.com>
+
+	* images/custom/down.xpm, images/custom/right.xpm: Update images
+	to increase contrast on bright backgrounds.
+
 2010-03-10  Chong Yidong  <cyd@stupidchicken.com>
 
 	* Branch for 23.2.

etc/images/custom/down.xpm

 /* XPM */
 static char * down_xpm[] = {
-"8 12 4 1",
+"9 9 4 1",
 " 	c none",
-".	c gray90",
-"X	c gray45",
-"O	c gray75",
-"........",
-".OOOOOOX",
-" .OOOOX ",
-" .OOOOX ",
-"  .OOX  ",
-"  .OOX  ",
-"   OX   ",
-"   OX   ",
-"        ",
-"        ",
-"        ",
-"        "};
+".	c black",
+"x	c gray45",
+"+	c white",
+".........",
+".x+++++x.",
+" .+++++. ",
+" .x+++x. ",
+"  .+++.  ",
+"  .x+x.  ",
+"   .+.   ",
+"   .x.   ",
+"    .    "};

etc/images/custom/right.xpm

 /* XPM */
 static char * right_xpm[] = {
-"8 12 4 1",
+"9 9 4 1",
 " 	c none",
-".	c gray90",
-"X	c gray45",
-"O	c gray75",
-"..      ",
-"..O.    ",
-"..OOO.  ",
-"..OOOOOX",
-"..OOOOXX",
-"..OOXX  ",
-"..XX    ",
-"OO      ",
-"        ",
-"        ",
-"        ",
-"        " };
+".	c black",
+"x	c gray45",
+"+	c white",
+"..       ",
+".x..     ",
+".++x..   ",
+".++++x.. ",
+".++++++x.",
+".++++x.. ",
+".++x..   ",
+".x..     ",
+"..       "};