Bug 26641 No option to disable "Assignment ... has no effect"
2.1 M3 I am missing an option to disable the compiler warning upon assigning a variable to itself...
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CompilerConfigurationBlock.java
return value.equals(fWorkingValues.get(key));
	}
	/* (non-javadoc)
	 * Update fields and validate.
	 * @param changedKey Key that changed, or null, if all changed.
	 */	
	private void validateSettings(String changedKey, String newValue) {
		if (changedKey != null) {
			if (INTR_DEFAULT_COMPLIANCE.equals(changedKey)) {
				updateComplianceEnableState();
				if (DEFAULT.equals(newValue)) {
					updateComplianceDefaultSettings();
				}
			} else if (PREF_COMPLIANCE.equals(changedKey)) {
				if (checkValue(INTR_DEFAULT_COMPLIANCE, DEFAULT)) {
					updateComplianceDefaultSettings();
				}
				fComplianceStatus= validateCompliance();
			} else if (PREF_SOURCE_COMPATIBILITY.equals(changedKey) ||
					PREF_CODEGEN_TARGET_PLATFORM.equals(changedKey) ||
					PREF_PB_ASSERT_AS_IDENTIFIER.equals(changedKey)) {
				fComplianceStatus= validateCompliance();
			} else if (PREF_PB_MAX_PER_UNIT.equals(changedKey)) {
				fMaxNumberProblemsStatus= validateMaxNumberProblems();
			} else if (PREF_RESOURCE_FILTER.equals(changedKey)) {
				fResourceFilterStatus= validateResourceFilters();
			} else if (PREF_COMPILER_TASK_TAGS.equals(changedKey)) {
				fTaskTagsStatus= validateTaskTags();
			} else {
				return;