Fix extractLongLatOrReply() sanity check conditionals.

the check for lat/long valid ranges were performed inside the for loop,
two times instead of one, and the first time when the second element of
the array, xy[1], was yet not populated. This resulted into issue #2799.

Close issue #2799.

src/geo.c

@@ -89,20 +89,20 @@ int decodeGeohash(double bits, double *xy) {
 /* Input Argument Helper */
 /* Take a pointer to the latitude arg then use the next arg for longitude.
  * On parse error C_ERR is returned, otherwise C_OK. */
-int extractLongLatOrReply(client *c, robj **argv,
-                                        double *xy) {
-    for (int i = 0; i < 2; i++) {
+int extractLongLatOrReply(client *c, robj **argv, double *xy) {
+    int i;
+    for (i = 0; i < 2; i++) {
         if (getDoubleFromObjectOrReply(c, argv[i], xy + i, NULL) !=
             C_OK) {
             return C_ERR;
         }
+    }
     if (xy[0] < GEO_LONG_MIN || xy[0] > GEO_LONG_MAX ||
         xy[1] < GEO_LAT_MIN  || xy[1] > GEO_LAT_MAX) {
         addReplySds(c, sdscatprintf(sdsempty(),
             "-ERR invalid longitude,latitude pair %f,%f\r\n",xy[0],xy[1]));
         return C_ERR;
     }
-    }
     return C_OK;
 }