Change kitchen sink glyph and color

The default sink glyph is already used for many other things:
iron bars, trees, corridors, drawbridges, and clouds.

Change the glyph to {, and change the color to white.
The glyph is only used for fountains, so it makes "safe"
water-related glyphs match.

doc/fixes3-7-0.txt

@@ -811,6 +811,7 @@ heroes starting with a spell have at least one level one spell, and
 	have just enough power to cast it
 huge monsters get easily out of pits
 give a message when a trapped monster frees itself from some trap
+change kitchen sink glyph to a white {
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository

include/defsym.h

@@ -130,7 +130,7 @@
     /* start cmap B */
     PCHAR( 32, '|',  S_grave, "grave", CLR(CLR_WHITE))
     PCHAR2(33, '\\', S_throne, "throne", "opulent throne", CLR(HI_GOLD))
-    PCHAR( 34, '#',  S_sink, "sink", CLR(CLR_GRAY))
+    PCHAR( 34, '{',  S_sink, "sink", CLR(CLR_WHITE))
     PCHAR( 35, '{',  S_fountain, "fountain", CLR(CLR_BRIGHT_BLUE))
     PCHAR2(36, '}',  S_pool, "pool", "water", CLR(CLR_BLUE))
     PCHAR( 37, '.',  S_ice, "ice", CLR(CLR_CYAN))