Restore USE_SHARED in configure.ac

Author: utelle

configure.ac

@@ -214,5 +214,7 @@ AM_CONDITIONAL([HOST_LINUX], [test "$build_linux" = "yes"])
 AM_CONDITIONAL([HOST_WINDOWS], [test "$build_windows" = "yes"])
 AM_CONDITIONAL([HOST_OSX], [test "$build_mac" = "yes"])
 
+AM_CONDITIONAL([USE_SHARED], [test "x$enable_shared" = xyes])
+
 AC_CONFIG_FILES([Makefile wxsqlite3.pc])
 AC_OUTPUT