patch 8.2.3613: :find test fails

Problem:    :find test fails.
Solution:   Put length check inside if block.

src/findfile.c

@@ -1735,11 +1735,11 @@ find_file_in_path_option(
     proc->pr_WindowPtr = (APTR)-1L;
 # endif
 
-    if (len == 0)
-	return NULL;
-
     if (first == TRUE)
     {
+	if (len == 0)
+	    return NULL;
+
 	// copy file name into NameBuff, expanding environment variables
 	save_char = ptr[len];
 	ptr[len] = NUL;

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3613,
 /**/
     3612,
 /**/