redundantAssignmentInSwitch: fix false positive when there is goto

lib/checkother.cpp

@@ -471,7 +471,7 @@ const Token *CheckOther::checkRedundantAssignmentRecursive(const Token *assign1,
             return nullptr;
         }
 
-        if (Token::Match(tok, "break|continue|return|throw")) {
+        if (Token::Match(tok, "break|continue|return|throw|goto")) {
             // TODO: handle these better
             *read = true;
             return nullptr;

test/testother.cpp

@@ -1932,6 +1932,14 @@ private:
               "}\n", nullptr, false, false, true);
         ASSERT_EQUALS("", errout.str());
 
+        check("void f() {\n"
+              "  int x;\n"
+              "  switch (state) {\n"
+              "  case 1: x = 3; goto a;\n"
+              "  case 1: x = 6; goto a;\n"
+              "  }\n"
+              "}");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void switchRedundantOperationTest() {