Fix ifAnyMissingClasses to return false if no classes are missing

Fixes #1003

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/DependencyCustomizer.java

@@ -96,7 +96,7 @@ public class DependencyCustomizer {
 						return true;
 					}
 				}
-				return DependencyCustomizer.this.canAdd();
+				return false;
 			}
 		};
 	}