lib: clean up whitespace

This fixes CodeFactor warnings.
diff --git a/lib/ftp.h b/lib/ftp.h
index 984347f..06421c6 100644
--- a/lib/ftp.h
+++ b/lib/ftp.h
@@ -150,7 +150,6 @@
      connection to */
   char *newhost;          /* this is the pair to connect the DATA... */
   unsigned short newport; /* connection to */
-
 };
 
 #define DEFAULT_ACCEPT_TIMEOUT   60000 /* milliseconds == one minute */
diff --git a/lib/smb.h b/lib/smb.h
index 9ce6b56..d1c45e2 100644
--- a/lib/smb.h
+++ b/lib/smb.h
@@ -193,7 +193,6 @@
   unsigned int ext_file_attributes;
   curl_off_t allocation_size;
   curl_off_t end_of_file;
-
 } PACK;
 
 struct smb_read {
diff --git a/lib/urldata.h b/lib/urldata.h
index 6e426a2..50d8b84 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -1333,7 +1333,6 @@
 };
 
 struct UrlState {
-
   /* Points to the connection cache */
   struct conncache *conn_cache;