patch 8.2.1728: compiler warning for using uninitialized variable

Problem:    Compiler warning for using uninitialized variable. (John Marriott)
Solution:   Initialize "neighbor".
diff --git a/src/search.c b/src/search.c
index 59b46e5..badf793 100644
--- a/src/search.c
+++ b/src/search.c
@@ -4293,7 +4293,7 @@
 	if (currIdx > 0)
 	{
 	    // Camel case
-	    int	neighbor;
+	    int	neighbor = ' ';
 	    int	curr;
 	    int	neighborSeparator;