fix: missing include result to fail build

[newbee1905]

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Description of Changes

I got some build error message:

/home/newbee/prjs/ai/qm9_ml/python-ace-master/lib/ace/ace-evaluator/lib/yaml-cpp/src/emitterutils.cpp:221:11: error: ‘uint16_t’ was not declared in this scope

221 | std::pair<uint16_t, uint16_t> EncodeUTF16SurrogatePair(int codePoint) {

| ^~~~~~~~

/home/newbee/prjs/ai/qm9_ml/python-ace-master/lib/ace/ace-evaluator/lib/yaml-cpp/src/emitterutils.cpp:13:1: note: ‘uint16_t’ is defined in header ‘<cstdint>’; this is probably fixable by adding ‘#include <cstdint>’

12 | #include "yaml-cpp/null.h"

+++ |+#include <cstdint>

So I just add the include for the type to the code in the file lib/ace/ace-evaluator/lib/yaml-cpp/src/emitterutils.cpp. Better solution would be updating yaml-cpp instead, but this is just a quick fix.

Checklist

• Code is well-documented.
• All tests have been run and passed.
• Relevant documentation has been updated if necessary.

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• The copyright for the code, including the submitted code, remains with Ruhr University Bochum. Ruhr University Bochum retains the right to transfer or modify the copyright.

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