Fix small bugs on glpi_install_rce

modules/exploits/multi/http/glpi_install_rce.rb

@@ -72,10 +72,11 @@ class Metasploit3 < Msf::Exploit::Remote
     if matched and matched[3] =~ /0.(8[0-4].[0-1])|([0-7][0-9].[0-9])/
       print_good("Detected Version : #{matched[3]}")
       return Exploit::CheckCode::Appears
-    else
+    elsif matched
       print_error("Version #{matched[3]} is not vulnerable")
-        return Exploit::CheckCode::Safe
     end
+    return Exploit::CheckCode::Safe
+
   end
 
   def exploit
@@ -94,7 +95,7 @@ class Metasploit3 < Msf::Exploit::Remote
       }
     })
 
-    unless res and res.code == 200 and res.body !~ /You will update the GLPI database/
+    unless res and res.code == 200 and res.body =~ /You will update the GLPI database/
       print_warning("Unexpected response while injecting the payload, trying to execute anyway...")
     end