Added test of the presence libgadu with automake

kopete/protocols/configure.in.in

@@ -27,6 +27,16 @@ fi
 dnl This may need a test still for compatibility
 COMPILE_GADU=true
 use_libgadu_copy=
+if test "$with_external_libgadu" != "no" ; then
+  # Check and setup for libgadu
+  KDE_PKG_CHECK_MODULES(LIBGG, libgadu, [have_libgg=yes], [have_libgg=no])
+  if test "x$have_libgg" = "xno"; then
+    COMPILE_GADU=
+    AC_MSG_RESULT([not found])
+  else
+    AC_MSG_RESULT([found])
+  fi
+fi
 
 AC_SUBST(LIBGG_INCLUDES)
 AC_SUBST(LIBGG_LIBS)