Fix #15014 FP syntaxError (negating dereferenced pointer) (#8830)

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

Author: chrchr-github

lib/tokenize.cpp

@@ -3768,7 +3768,7 @@ void Tokenizer::concatenateNegativeNumberAndAnyPositive()
         if (tok->findOpeningBracket())
             continue;
 
-        if (!tok->tokAt(2) || (tok->tokAt(2)->isOp() && !Token::Match(tok->tokAt(2), "[+-]")))
+        if (!tok->tokAt(2) || (tok->tokAt(2)->isOp() && !Token::Match(tok->tokAt(2), "[+-*]")))
             syntaxError(tok);
 
         while (tok->str() != ">" && tok->next() && tok->strAt(1) == "+" && (!Token::Match(tok->tokAt(2), "%name% (|;") || Token::Match(tok, "%op%")))

test/testtokenize.cpp

@@ -8084,6 +8084,10 @@ class TestTokenizer : public TestFixture {
                                              "    for (int i : [](int a, int b) { ++a; ++b; return std::vector<int>{a, b}; }(1, 2)) {}\n"
                                              "}\n"));
 
+        ASSERT_NO_THROW(tokenizeAndStringify("void f(int* p) {\n" // #15014
+                                             "    *p = -*p;\n"
+                                             "}\n"));
+
         ignore_errout();
 
         ASSERT_EQUALS(";", tokenizeAndStringify("typedef std::size_t size_t;\n")); // #14809