5189: Fix 0 byte malloc in register.cpp (fixes #5187) r=heinrich5991 a=def-

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## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test if it works standalone, system.c especially
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: def <dennis@felsin9.de>
This commit is contained in:
bors[bot] 2022-05-23 07:15:54 +00:00 committed by GitHub
commit 847454f3be
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@ -1,6 +1,7 @@
#ifndef ENGINE_SHARED_HTTP_H
#define ENGINE_SHARED_HTTP_H
#include <algorithm>
#include <atomic>
#include <engine/shared/jobs.h>
@ -105,7 +106,7 @@ public:
{
m_Type = REQUEST::POST;
m_BodyLength = DataLength;
m_pBody = (unsigned char *)malloc(DataLength);
m_pBody = (unsigned char *)malloc(std::max((size_t)1, DataLength));
mem_copy(m_pBody, pData, DataLength);
}
void PostJson(const char *pJson)