Fix #13210 fuzzing crash in getEnumType() (danmar#6907)

Author: chrchr-github

lib/tokenize.cpp

@@ -8747,6 +8747,8 @@ void Tokenizer::findGarbageCode() const
                      !(tok->tokType() == Token::Type::eBoolean && cpp && Token::simpleMatch(tok->tokAt(-1), "requires")))
                 syntaxError(tok);
         }
+        if (Token::Match(tok, "( ) %num%|%bool%|%char%|%str%"))
+            syntaxError(tok);
         if (Token::Match(tok, "%assign% typename|class %assign%"))
             syntaxError(tok);
         if (Token::Match(tok, "%assign% [;)}]") && (!cpp || !Token::simpleMatch(tok->previous(), "operator")))

test/cli/fuzz-crash/crash-889549c7af3edaaf3e6e6f0783a42f4bcab7167e

@@ -0,0 +1 @@
+{enum{A=s()0=s};}

test/testgarbage.cpp

@@ -679,8 +679,7 @@ class TestGarbage : public TestFixture {
     }
 
     void garbageCode48() { // #6712 (segmentation fault)
-        (void)checkCode(" { d\" ) d ...\" } int main ( ) { ( ) catch ( A a ) { { } catch ( ) \"\" } }");
-        ignore_errout(); // we do not care about the output
+        ASSERT_THROW_INTERNAL(checkCode(" { d\" ) d ...\" } int main ( ) { ( ) catch ( A a ) { { } catch ( ) \"\" } }"), SYNTAX);
     }
 
     void garbageCode49() { // #6715