updated for version 7.3.819
Problem:    Compiling without +eval and with Python isn't working.
Solution:   Add the eval feature when building with Python.
diff --git a/src/feature.h b/src/feature.h
index f54f59a..f2dcca2 100644
--- a/src/feature.h
+++ b/src/feature.h
@@ -392,6 +392,13 @@
 #endif
 
 /*
+ * +python and +python3 require FEAT_EVAL.
+ */
+#if !defined(FEAT_EVAL) && (defined(FEAT_PYTHON3) || defined(FEAT_PYTHON))
+# define FEAT_EVAL
+#endif
+
+/*
  * +profile		Profiling for functions and scripts.
  */
 #if defined(FEAT_HUGE) \