[Clang-Tidy] Quick fix for bug in bugprone-macro-parentheses 43804

Applying parentheses for statement leads to compilation error. Bug
[[ 43804 | https://bugs.llvm.org/show_bug.cgi?id=43804 ]] is a
compilation error suggested by a wrong fix of this checker. This
patch is a quick fix for this issue.

Differential Revision: https://reviews.llvm.org/D70850

clang-tools-extra/clang-tidy/bugprone/MacroParenthesesCheck.cpp

@@ -54,7 +54,7 @@ static bool isSurroundedRight(const Token &T) {
 /// Is given TokenKind a keyword?
 static bool isKeyword(const Token &T) {
   // FIXME: better matching of keywords to avoid false positives.
-  return T.isOneOf(tok::kw_case, tok::kw_const, tok::kw_struct);
+  return T.isOneOf(tok::kw_if, tok::kw_case, tok::kw_const, tok::kw_struct);
 }
 
 /// Warning is written when one of these operators are not within parentheses.

clang-tools-extra/test/clang-tidy/checkers/bugprone-macro-parentheses.cpp

@@ -43,6 +43,7 @@
 #define GOOD30(args...)   std::cout << args;
 #define GOOD31(X)         A*X=2
 #define GOOD32(X)         std::vector<X>
+#define GOOD33(x)         if (!a__##x) a_##x = &f(#x)
 
 // These are allowed for now..
 #define MAYBE1            *12.34