fix building of slurpd(8) according to Thomas

openldap/openldap.spec

@@ -102,7 +102,7 @@ AutoReqProv:  no
 %endif
     CC="%{l_cc}" \
     CFLAGS="%{l_cflags -O} `%{l_prefix}/bin/pth-config --cflags`" \
-    CPPFLAGS="$cf" \
+    CPPFLAGS="$cf -I`%{l_prefix}/bin/pth-config --includedir`" \
     LDFLAGS="%{l_ldflags} `%{l_prefix}/bin/pth-config --ldflags` %{l_fsl_ldflags}" \
     LIBS="`%{l_prefix}/bin/pth-config --libs` %{l_fsl_libs}" \
     ./configure \