Define USE_MAILBOX_QUOTAS after including mu_dbm.h

@@ -68,11 +68,6 @@
 # define INADDR_LOOPBAK 0x7f000001
 #endif
 
-#if defined (USE_DBM) || defined (USE_SQL)
-# define USE_MAILBOX_QUOTAS 1
-#endif
-
-#include <mailutils/argp.h>
 #include <mailutils/attribute.h>
 #include <mailutils/errno.h>
 #include <mailutils/error.h>
@@ -92,6 +87,11 @@
 #include <mu_asprintf.h>
 #include <getline.h>
 
+#if defined (USE_DBM) || defined (USE_SQL)
+# define USE_MAILBOX_QUOTAS 1
+#endif
+
+#include <mailutils/argp.h>
 /* Debug */
 extern int debug_level;
 #define dbg() if (debug_level) debug

@@ -76,9 +76,15 @@ dbm_retrieve_quota (char *name, size_t *quota)
   int unlimited = 0;
   int rc;
 
-  if (!quotadbname || mu_dbm_open (quotadbname, &db, MU_STREAM_READ, 0600)) 
+  if (!quotadbname)
     return RETR_FAILURE;
   
+  if (mu_dbm_open (quotadbname, &db, MU_STREAM_READ, 0600))
+    {
+      mu_error (_("Cannot open %s: %s"), quotadbname, mu_strerror (errno));
+      return RETR_FAILURE;
+    }
+  
   memset (&named, 0, sizeof named);
   memset (&contentd, 0, sizeof contentd);
   MU_DATUM_PTR (named) = name;