patch 9.0.0371: compiler warning for uninitialized variable

Problem:    Compiler warning for uninitialized variable.
Solution:   Initialize the variable. (John Marriott)
diff --git a/src/eval.c b/src/eval.c
index b8aa79f..6b2d86b 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -694,7 +694,7 @@
 {
     typval_T	ref;
     char_u	*name = *arg;
-    int		save_flags;
+    int		save_flags = 0;
 
     ref.v_type = VAR_UNKNOWN;
     if (evalarg != NULL)