Description: Fix ftbfs with GCC-10

Bug-Debian: https://bugs.debian.org/957106
Bug-Debian: https://bugs.debian.org/1067439
---

--- a/src/include/plugins/ldap/ldap.h
+++ b/src/include/plugins/ldap/ldap.h
@@ -106,7 +106,7 @@ typedef struct CPU_ldap {
   Parser * parse;
 } CPU_ldap;
 
-CPU_ldap * globalLdap;
+extern CPU_ldap * globalLdap;
 
 int parseCommand(int argc, char *argv[]);
 void printHelp(int op);
--- a/src/plugins/ldap/ldap.c
+++ b/src/plugins/ldap/ldap.c
@@ -26,6 +26,8 @@
 #include <stdio.h>
 #include "plugins/ldap/ldap.h"
 
+CPU_ldap * globalLdap;
+
 int verbose;
 int operation;