Consistently exclude macro generated statements

Author: lcartey

cpp/common/src/codingstandards/cpp/rules/deadcode/DeadCode.qll

@@ -115,7 +115,7 @@ class DeadStmtInstance extends Stmt {
     // Exclude compiler generated statements
     not this.isCompilerGenerated() and
     // Exclude code fully generated by macros, because the code may be "live" in other expansions
-    not this.isInMacroExpansion() and
+    isNotWithinMacroExpansion(this) and
     // MISRA defines dead code as an "_executed_ statement whose removal would not affect the program
     // output". We therefore exclude unreachable statements as they are, by definition, not executed.
     not this.getBasicBlock() = any(UnreachableBasicBlock ubb).getABasicBlock()