Fix native emitter compile

Author: tannewt

py/emitglue.c

@@ -43,6 +43,7 @@
 #define DEBUG_printf DEBUG_printf
 #define DEBUG_OP_printf(...) DEBUG_printf(__VA_ARGS__)
 #else // don't print debugging info
+#define DEBUG_PRINT (0)
 #define DEBUG_printf(...) (void)0
 #define DEBUG_OP_printf(...) (void)0
 #endif

py/emitnative.c

@@ -55,6 +55,7 @@
 #define DEBUG_PRINT (1)
 #define DEBUG_printf DEBUG_printf
 #else // don't print debugging info
+#define DEBUG_PRINT (0)
 #define DEBUG_printf(...) (void)0
 #endif