Fixes almost all the logging options which were previously broken

src/printer/prt_escp.c

@@ -48,6 +48,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING  IN ANY  WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <string.h>
@@ -56,6 +57,7 @@
 #include <math.h>
 #include <ft2build.h>
 #include FT_FREETYPE_H
+#define HAVE_STDARG_H
 #include <86box/86box.h>
 #include "cpu.h"
 #include <86box/machine.h>