fix some compiler warnings

ldap/servers/plugins/cos/cos_cache.c

@@ -3530,7 +3530,6 @@ static int cos_cache_follow_pointer( vattr_context *c, const char *dn, char *typ
 		}
 	}
 
-bail:
 	/* clean up */
 	if(pDnSearch)
 	{

ldap/servers/slapd/agtmmap.c

@@ -310,6 +310,7 @@ agt_mopen_stats (char * statsfile, int mode, int *hdl)
 
 #endif /* !__WINNT__ */
 
+    return 0;
 }  /* agt_mopen_stats () */
 
 

ldap/servers/slapd/dn.c

@@ -510,7 +510,6 @@ slapi_dn_normalize_ext(char *src, size_t src_len, char **dest, size_t *dest_len)
     struct berval *subrdn_avs = NULL;
     struct berval subinitial_rdn_av_stack[ SLAPI_DNNORM_INITIAL_RDN_AVS ];
     int chkblank = 0;
-    int avstat = 0;
 
     if (NULL == dest) {
         goto bail;