adds missing semicolon in coap.c
This change is necessary for compiling the codebase with
arm-none-eabi-gcc. The compiler expects a statement after the
`leave_notify_observers` label, and the semicolon provides that without
altering the behaviour of the program.
@@ -716,6 +716,7 @@ coap_notify_observers(oc_resource_t *resource,
obs = obs->next;
} // iterate over observers
leave_notify_observers:
+ ;
#ifdef OC_DYNAMIC_ALLOCATION
if (buffer) {
free(buffer);
