patch 8.2.4485: compiler warning for uninitialized variable

Problem:    Compiler warning for uninitialized variable.
Solution:   Initialize the variable. (John Marriott)
diff --git a/src/cmdexpand.c b/src/cmdexpand.c
index f46045e..b261415 100644
--- a/src/cmdexpand.c
+++ b/src/cmdexpand.c
@@ -3003,7 +3003,7 @@
     garray_T	ga;
     int		fuzzy;
     int		match;
-    int		score;
+    int		score = 0;
 
     fuzzy = cmdline_fuzzy_complete(pat);
     *matches = NULL;