Fix #14044 FP constStatement for sizeof in uninstantiated template's argument list (#7716)

Co-authored-by: chrchr-github <noreply@github.com>

Author: chrchr-github

lib/checkother.cpp

@@ -2299,7 +2299,7 @@ void CheckOther::checkIncompleteStatement()
         if (!Token::simpleMatch(tok->astParent(), ";") && !Token::simpleMatch(rtok, ";") &&
             !Token::Match(tok->previous(), ";|}|{ %any% ;") &&
             !(tok->isCpp() && tok->isCast() && !tok->astParent()) &&
-            !(!tok->astParent() && Token::Match(tok->previous(), "%name% (") && tok->previous()->isKeyword()) &&
+            !(!tok->astParent() && tok->astOperand1() && Token::Match(tok->previous(), "%name% (") && tok->previous()->isKeyword()) &&
             !Token::simpleMatch(tok->tokAt(-2), "for (") &&
             !Token::Match(tok->tokAt(-1), "%var% [") &&
             !(tok->str() == "," && tok->astParent() && tok->astParent()->isAssignmentOp()))

test/testincompletestatement.cpp

@@ -743,6 +743,11 @@ class TestIncompleteStatement : public TestFixture {
                       "[test.cpp:4:13]: (warning) Redundant code: Found unused 'noexcept' expression. [constStatement]\n"
                       "[test.cpp:5:11]: (warning) Redundant code: Found unused 'typeid' expression. [constStatement]\n",
                       errout_str());
+
+        check("void f() {\n" // #14044
+              "    g<sizeof(wchar_t)>();\n"
+              "}\n");
+        ASSERT_EQUALS("", errout_str());
     }
 
     void vardecl() {