Fix alpha char missing crash. Will now place Z!

src/main/kotlin/helpers/FacetBuildHelpers.kt

@@ -19,13 +19,14 @@
 package org.memobase.helpers
 
 import com.beust.klaxon.JsonObject
+import org.apache.logging.log4j.LogManager
 import org.memobase.KEYS
 
 /**
  * Helper functions to build hierarchical facet values for places and persons.
  */
 object FacetBuildHelpers {
-
+    private val log = LogManager.getLogger("FacetBuildHelper")
     private const val separator = "~"
 
     private const val level1 = "0"
@@ -80,7 +81,12 @@ object FacetBuildHelpers {
 
     private fun getCapitalLetter(name: String): Char {
         val foldedName = AsciiFolder.foldToASCII(name)
-        val firstChar = foldedName.first { isAlphaChar.matches(it.toString()) }
-        return firstChar.toUpperCase()
+        return try {
+            val firstChar = foldedName.first { isAlphaChar.matches(it.toString()) }
+            firstChar.toUpperCase()
+        } catch (ex: NoSuchElementException) {
+            log.error("The name does not contain a valid alpha character: $foldedName.")
+            'Z'
+        }
     }
 }