[clang] [clang][analyzer] Model more getline/getdelim pre and postconditions (PR #83027)

[Alejandro Álvarez Ayllón via cfe-commits]

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@@ -234,6 +235,9 @@ class StreamChecker : public Checker<check::PreCall, eval::Call,
   BugType BT_StreamEof{this, "Stream already in EOF", "Stream handling error"};
   BugType BT_ResourceLeak{this, "Resource leak", "Stream handling error",
                           /*SuppressOnSink =*/true};
+  BugType BT_SizeNull{this, "NULL size pointer", "Stream handling error"};
+  BugType BT_SizeNotZero{this, "NULL line pointer and size not zero",
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alejandro-alvarez-sonarsource wrote:

Replaced with `BT_NullPtr`.

https://github.com/llvm/llvm-project/pull/83027