Fix allocation error; fix some static analyzer suggestions.

regression_testing/cases/dev-cases/README.txt

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+About this test suite:
+======================
+
+These test files represent that standard regression testing that must be
+performed prior to committing changes to Tidy's code. In some circumstances
+results are platform specific and these notices will be displayed in the
+testing results.
+
+This test set is intended to collect tests that don't necessarily have an
+associated Github issue number, but are developed in the course of Tidy
+development.

regression_testing/cases/dev-cases/config_default.conf

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+// HTML Tidy configuration - 20151217
+indent: auto
+char-encoding: latin1
+tidy-mark: no
+clean: yes
+logical-emphasis: yes
+indent-attributes: yes