Fix search/replace history adding blank lines, yuck

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1335 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

search.c

@@ -453,6 +453,7 @@ int do_search(void)
 
 #ifndef NANO_SMALL
     /* add this search string to the search history list */
+    if (strcmp(answer, ""))
 	update_history(&search_history, answer);
 #endif	/* !NANO_SMALL */
 
@@ -739,6 +740,7 @@ int do_replace(void)
     }
 
 #ifndef NANO_SMALL
+    if (strcmp(answer, ""))
 	update_history(&search_history, answer);
 #endif	/* !NANO_SMALL */
 
@@ -788,7 +790,7 @@ int do_replace(void)
 		_("Replace with"));
    }
 #ifndef NANO_SMALL
-    if (i == 0)
+    if (i == 0 && strcmp(answer, ""))
 	update_history(&replace_history, answer);
 #endif	/* !NANO_SMALL */