Missing initialization of variables in classes/structs found by Cppcheck

[qarmin]

Godot version:
4.0.dev.custom_build.dd5485142

Issue description:
A lot of variables(812 but some are not counted and some are false positives) aren't initialized in constructors or directly where there are created in classe like(look at non initialized left variable which should be nullptr):

godot/core/math/quick_hull.h

Line 73 in 90edd83

List<Face>::Element *left, *right = nullptr;

which may cause(and caused before) hard to reproduce errors.

How to fix them?

1. Open Cppcheck report from below, open one of reports and read error e.g. Member variable 'FaceConnect::left' is not initialized in the constructor. and initialize this variable with default values like

class HashingContext : public Reference {
	void *ctx;
        int rar;
        bool q;
public:
	HashingContext() {}
	~HashingContext();
};

should be changed to

class HashingContext : public Reference {
	void *ctx = nullptr;
        int rar = 0;
        bool q = false;
public:
	HashingContext() {}
	~HashingContext();
};

not (it is harder to read)

class HashingContext : public Reference {
	void *ctx;
        int rar;
        bool q;
public:
	HashingContext() {
        ctx = nullptr;
        rar = 0;
        q = false;
}
	~HashingContext();
};

You can also move some value initialization from constructors to place where are created in structs/classes.

Cppcheck Report

Cppcheck report to download(remove .zip extension) - report.7z.zip
To view results, just open index.html file and only select at the left side uninitMemberVar

Command which I used to generate this report

cppcheck -q -j8 -ithirdparty -i3rdparty -itests -itest -itoolchain -itools  --enable=all --force --output-file=cppcheck.xml --xml --xml-version=2 .;cppcheck-htmlreport --source-dir=. --title=project --file=cppcheck.xml --report-dir=report;xdg-open report/index.html

[valdaarhun]

Hi. I am new to contributing to godot and would like to work on this issue.

[qarmin]

Entire servers/ folder is available to take

[valdaarhun]

Nice. I have already started working on the servers/ folder.

[KarthikSundar2002]

What is the progress in this issue? Is the issue fixed? If not, I would like to lend a hand.

[qarmin]

Looks that all folders which contains Cppcheck errors have already closed or still open PR which will fix them.

[Ponnyou]

I noticed that this problem was still open. I would like to help if possible or has everything been checked and closed already?

[VVR20]

Hi. I am new to contributing to Godot and would like to work on this issue if the problem is still open.

[Robotawi]

Is any help still needed with this issue? @qarmin

[johnnyhuyhuynh]

Is this still being worked on? @qarmin
If so, I would love to take on this issue.

[johnnyhuyhuynh]

I’ll work on this!