explicitly cast uint to int to avoid error (#1307)

Second half of PR to perform cast and compare of casted value.
Previous commit performed the cast, but was still comparing against the
non-cast value :-(

Signed-off-by: Glen Gibb <[email protected]>

Author: grg

src/BMI/bmi_interface.c

@@ -175,7 +175,7 @@ int bmi_interface_recv_with_copy(bmi_interface_t *bmi, char *data, int max_len)
 
   assert(pkt_header->len < INT_MAX);
   int pkt_header_len = (int)pkt_header->len;
-  rv = (max_len < pkt_header->len) ? max_len : pkt_header->len;
+  rv = (max_len < pkt_header_len) ? max_len : pkt_header_len;
 
   memcpy(data, pkt_data, rv);