Fix Coverity Scan 1486961 Resource leak

src/context.c

@@ -220,7 +220,7 @@ void context__disconnect(struct mosquitto *context)
 	if(context->transport == mosq_t_ws){
 		uint8_t buf[4] = {0x88, 0x02, 0x03, context->wsd.disconnect_reason};
 		/* Send the disconnect reason, but don't care if it fails */
-		if(send(context->sock, buf, 4, 0));
+		if(send(context->sock, buf, 4, 0)){};
 	}
 #endif
 	plugin__handle_disconnect(context, -1);

src/subs.c

@@ -297,13 +297,15 @@ static int sub__add_normal(struct mosquitto *context, const char *sub, uint8_t q
 		csub->hier = subhier;
 		csub->shared = NULL;
 
+		bool assigned = false;
 		for(i=0; i<context->sub_count; i++){
 			if(!context->subs[i]){
 				context->subs[i] = csub;
+				assigned = true;
 				break;
 			}
 		}
-		if(i == context->sub_count){
+		if(assigned == false){
 			subs = mosquitto__realloc(context->subs, sizeof(struct mosquitto__client_sub *)*(size_t)(context->sub_count + 1));
 			if(!subs){
 				DL_DELETE(subhier->subs, newleaf);