Fix(win32): include

config.w32

@@ -12,6 +12,8 @@ if (PHP_XLSWRITER != "no") {
 
         EXTENSION("xlswriter", "xlswriter.c")
 
+        ADD_FLAG("CFLAGS_XLSWRITER", ' /I "' + configure_module_dirname + '" ');
+
         AC_DEFINE("HAVE_LXW_VERSION", 1, "lxw_version available in 0.7.7");
 
         ADD_SOURCES(configure_module_dirname + "\\kernel", "common.c resource.c exception.c excel.c write.c format.c chart.c", "xlswriter");