Small improvement

app/src/main/java/eu/faircode/email/EntityAnswer.java

@@ -75,12 +75,16 @@ public class EntityAnswer implements Serializable {
         if (name != null) {
             name = name.trim();
             int c = name.lastIndexOf(",");
+            if (c < 0) {
+                c = name.lastIndexOf(" ");
                 if (c < 0) {
                     first = name;
                     last = name;
                 } else {
-                first = name.substring(c + 1).trim();
-                last = name.substring(0, c).trim();
+                    first = name.substring(0, c).trim();
+                    last = name.substring(c + 1).trim();
+                }
+            } else {
             }
         }