Fix #14451 fuzzing crash (stack-overflow) in CheckNullPointer::nullPointerByDeRefAndCheck() (danmar#8199)

Author: chrchr-github

lib/tokenize.cpp

@@ -8987,6 +8987,8 @@ void Tokenizer::findGarbageCode() const
             if (!Token::Match(tok->next(), "%name%|*|~"))
                 syntaxError(tok, tok->strAt(-1) + " " + tok->str() + " " + tok->strAt(1));
         }
+        if (Token::Match(tok, ".|-> .|->"))
+            syntaxError(tok);
         if (Token::Match(tok, "[{,] . %name%") && !Token::Match(tok->tokAt(3), "[.=[{]"))
             syntaxError(tok->next());
         if (Token::Match(tok, "%name% %op% %name%") && !tok->isKeyword() && tok->next()->isIncDecOp())

test/cli/fuzz-crash_c/crash-18b7d7437e79f7e1b843b676e0c3beaf4929d043

@@ -0,0 +1 @@
+v(){p?1:p..}