fix issue with null text

Author: summitt

src/com/fuse/actions/scheduling/Engagement.java

@@ -706,7 +706,7 @@ public void validate() {
 		Pattern p = Pattern.compile(emailRegex);
 		String [] emails = this.distro.split(";");
 		for(String mail : emails) {
-			Matcher m = p.matcher(mail.trim());
+			Matcher m = p.matcher(mail.toLowerCase().trim());
 			if(m.matches())
 				continue;
 			else