games/qjoypad: Fixed underlinking.

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

games/qjoypad/qjoypad.SlackBuild

@@ -6,7 +6,7 @@
 
 PRGNAM=qjoypad
 VERSION=${VERSION:-4.1.0}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 # Automatically determine the architecture we're building on:
@@ -53,6 +53,9 @@ find . \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;
 
+# Fix underlinking
+sed -i "s|-lXtst|-lXtst -lX11|" src/qjoypad.pro
+
 cd src
 
 # make install does not support DESTDIR,