rename misleading define

Author: mapopa

ext/interbase/php_ibase_includes.h

@@ -35,8 +35,7 @@
 
 #define IB_STATUS (IBG(status))
 
-/* XXX ZEND_DEBUG_ is misleading, it should be something like IBASE_DEBUG. */
-#ifdef ZEND_DEBUG_
+#ifdef IBASE_DEBUG
 #define IBDEBUG(a) php_printf("::: %s (%d)\n", a, __LINE__);
 #endif