Bug 45110 No constant for '..compiler.problem.missingAnnotation'
20031015 The constant for "org.eclipse.jdt.core.compiler.problem.missingAnnotation" is missing. e.g. JavaCore.COMPILER_PB_MISSING_ANNOTATION;
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CompilerConfigurationBlock.java
*/	
	protected void validateSettings(String changedKey, String newValue) {
		
		if (changedKey != null) {
			if (INTR_DEFAULT_COMPLIANCE.equals(changedKey)) {
				updateComplianceEnableState();
				if (DEFAULT.equals(newValue)) {
					updateComplianceDefaultSettings();
				}
				fComplianceStatus= validateCompliance();
			} 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_PB_UNUSED_PARAMETER.equals(changedKey) ||
					PREF_PB_DEPRECATION.equals(changedKey) ||
					PREF_PB_INVALID_ANNOTATION.equals(changedKey) ||
					PREF_PB_LOCAL_VARIABLE_HIDING.equals(changedKey)) {				
				updateEnableStates();
			} else {
				return;