Find libzia in `libzia` instead of `../libzia`

--- a/configure.ac
+++ b/configure.ac
@@ -188,13 +188,13 @@ PKG_CHECK_MODULES(zia, libzia, [libzia_v
 LIBZIA_CFLAGS=$zia_CFLAGS
 LIBZIA_LIBS=$zia_LIBS
 
-if test -d "../libzia"; then
-    echo "existuje ../libzia"
-    tucnak_libzia_ver="$(sh ../libzia/bin/zia-config --version) in $(readlink -f ../libzia/bin/zia-config)"
-    tucnak_libzia_settings="../libzia/settings"
-    LIBZIA_CFLAGS="$(bash ../libzia/bin/zia-config --cflags2) -I$(readlink -f ../libzia/include) -I$(readlink -f ../libzia/include/unix)"
-    LIBZIA_LIBS="-L$(readlink -f ../libzia/src/.libs) -Wl,-Bstatic -lzia -Wl,-Bdynamic $(bash ../libzia/bin/zia-config --libs2)"
-    AC_MSG_RESULT([yes; static in ../libzia/src])
+if test -d "libzia"; then
+    echo "existuje libzia"
+    tucnak_libzia_ver="$(sh libzia/bin/zia-config --version) in $(readlink -f libzia/bin/zia-config)"
+    tucnak_libzia_settings="libzia/settings"
+    LIBZIA_CFLAGS="$(bash libzia/bin/zia-config --cflags2) -I$(readlink -f libzia/include) -I$(readlink -f libzia/include/unix)"
+    LIBZIA_LIBS="-L$(readlink -f libzia/src/.libs) -Wl,-Bstatic -lzia -Wl,-Bdynamic $(bash libzia/bin/zia-config --libs2)"
+    AC_MSG_RESULT([yes; static in libzia/src])
 else
     echo "neexistuje ../libzia"
 
