Fix #14393 FP syntaxError for anonymous bit field (danmar#8119)

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

Author: chrchr-github

lib/tokenize.cpp

@@ -8837,6 +8837,8 @@ void Tokenizer::findGarbageCode() const
             if (tok->str() == ";") { // do the counting
                 semicolons++;
             } else if (tok->str() == ":") {
+                if (tok->strAt(-1) == ",")
+                    syntaxError(tok);
                 colons++;
             } else if (tok->str() == ")") { // skip pairs of ( )
                 tok = tok->link();
@@ -8960,8 +8962,6 @@ void Tokenizer::findGarbageCode() const
             syntaxError(tok);
         if (Token::Match(tok, ": [)]=]"))
             syntaxError(tok);
-        if (Token::simpleMatch(tok, ", :"))
-            syntaxError(tok);
         if (Token::Match(tok, "typedef [,;:]"))
             syntaxError(tok);
         if (Token::Match(tok, "? %assign%"))

test/testtokenize.cpp

@@ -7681,6 +7681,8 @@ class TestTokenizer : public TestFixture {
 
         ASSERT_NO_THROW(tokenizeAndStringify("enum { E = sizeof(struct { int i; }) };")); // #13249
 
+        ASSERT_NO_THROW(tokenizeAndStringify("struct S { unsigned u:2, :30; };")); // #14393
+
         ignore_errout();
     }