GUI: display error message during preregistration if email is in use

iTrust/WebRoot/util/PreRegisterPatient.jsp

@@ -5,6 +5,7 @@
 <%@page import="edu.ncsu.csc.itrust.BeanBuilder"%>
 <%@page import="edu.ncsu.csc.itrust.beans.PatientBean"%>
 <%@page import="edu.ncsu.csc.itrust.exception.FormValidationException"%>
+<%@page import="edu.ncsu.csc.itrust.exception.ITrustException"%>
 
 <%@include file="/global.jsp" %>
 
@@ -68,6 +69,13 @@ if (formIsFilled) {
         <span class="iTrustError"> <%= StringEscapeUtils.escapeHtml(e.getMessage()) %></span>
         <!-- StringEscapeUtils.escapeHtml(e.getMessage())  -->
     </div>
+<%
+	} catch (ITrustException e) {
+%>
+    <div align=center>
+		<span class="iTrustError"> <%= StringEscapeUtils.escapeHtml(e.getMessage()) %></span>
+		<!-- StringEscapeUtils.escapeHtml(e.getMessage())  -->
+	</div>
 <%
     }
 }