SDLvncviewer: fix button handling

For some reason, I swapped buttons 2 and 3 on Dec 7, 2005, in commit
"translate keys based on unicode (much more reliable than sym)".
I do not remember why, nor what I smoked, but this was wrong.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

ChangeLog

@@ -1,3 +1,7 @@
+2008-02-02  Johannes E. Schindelin  <Johannes.Schindelin@gmx.de>
+	* client_examples/SDLvncviewer.c: fix buttons (2 & 3 were switched),
+		fix Tab key, and fix Ctrl+<letter>
+
 2008-01-29  Christian Ehrlicher <Ch.Ehrlicher@gmx.de>
 	* libvncserver/rfbserver.c: add missing #include <time.h>
 

TODO

@@ -4,7 +4,6 @@ immediate:
 Implement ZYWRLE decoding in libvncclient
 make SDLvncviewer more versatile (test for missing keys, introduce scrollbars,
 	make scrollable with 2xCtrl and mouse drag)
-	- 2nd and 3rd mouse button are switched
 Clean up ZRLE (probably not thread-safe: zrleBeforeBuf, zrlePaletteHelper)
 style fixes: use Linux' coding guidelines & ANSIfy tightvnc-filetransfer:
 	discuss on list

client_examples/SDLvncviewer.c

@@ -3,8 +3,8 @@
 
 struct { int sdl; int rfb; } buttonMapping[]={
 	{1, rfbButton1Mask},
-	{3, rfbButton2Mask},
-	{2, rfbButton3Mask},
+	{2, rfbButton2Mask},
+	{3, rfbButton3Mask},
 	{0,0}
 };