[clang] Fix false match on nullPointerConstant for array indices (PR #201893)

[Kay Hicketts via cfe-commits]

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@@ -4049,6 +4049,7 @@ TEST_P(ASTMatchersTest, NullPointerConstant) {
   EXPECT_TRUE(matches("char *cp = (char *)0;", expr(nullPointerConstant())));
   EXPECT_TRUE(matches("int *ip = 0;", expr(nullPointerConstant())));
   EXPECT_FALSE(matches("int i = 0;", expr(nullPointerConstant())));
+  EXPECT_FALSE(matches("int *p[1]; (void)p[0];", expr(nullPointerConstant())));
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KHicketts wrote:

that's super weird.  I didn't know you could do that 👀 

https://github.com/llvm/llvm-project/pull/201893