Unified handling of empty queries with normal queries.

redis.c

@@ -1877,12 +1877,6 @@ again:
             sdsupdatelen(query);
 
             /* Now we can split the query in arguments */
-            if (sdslen(query) == 0) {
-                /* Ignore empty query */
-                sdsfree(query);
-                if (sdslen(c->querybuf)) goto again;
-                return;
-            }
             argv = sdssplitlen(query,sdslen(query)," ",1,&argc);
             sdsfree(query);
 

sds.c

@@ -277,6 +277,10 @@ sds *sdssplitlen(char *s, int len, char *sep, int seplen, int *count) {
     if (tokens == NULL) sdsOomAbort();
 #endif
     if (seplen < 1 || len < 0 || tokens == NULL) return NULL;
+    if (len == 0) {
+        *count = 0;
+        return tokens;
+    }
     for (j = 0; j < (len-(seplen-1)); j++) {
         /* make sure there is room for the next element and the final one */
         if (slots < elements+2) {