Handle OOM situations

[scaprile]

No description provided.

[cpq]

There is no change to mg_vprintf() in net.c - is that intentional ?

[scaprile]

There is no change to mg_vprintf() in net.c - is that intentional ?

That's already been merged after testing, since you suggested it I assumed you'd approve it.

mongoose/src/net.c

Lines 10 to 20 in b3b73f4

	size_t mg_vprintf(struct mg_connection *c, const char *fmt, va_list *ap) {
	size_t old = c->send.len;
	size_t expected = mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap);
	size_t actual = c->send.len - old;
	if (actual != expected) {
	mg_error(c, "OOM");
	c->send.len = old;
	actual = 0;
	}
	return actual;
	}