Prevent substring call if the result would be an empty string

Author: Postremus

hibernate-core/src/main/java/org/hibernate/internal/util/StringHelper.java

@@ -128,7 +128,10 @@ public static String replace(
 			return template;
 		}
 		else {
-			String beforePlaceholder = template.substring( 0, loc );
+			String beforePlaceholder = "";
+			if (loc > 0) {
+				beforePlaceholder = template.substring(0, loc);
+			}
 			String afterPlaceholder = template.substring( loc + placeholder.length() );
 			return replace(
 					beforePlaceholder,