[glom] Throw the same exception instead of a copy.

[Murray Cumming <murrayc src gnome org>]

commit 5312e454cb0043a9adbe495fb465686ca2d0a848
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Oct 30 14:17:44 2015 +0100

    Throw the same exception instead of a copy.
    
    Found by cppcheck.

 glom/libglom/connectionpool_backends/mysql_self.cc |    2 +-
 .../connectionpool_backends/postgres_self.cc       |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/glom/libglom/connectionpool_backends/mysql_self.cc 
b/glom/libglom/connectionpool_backends/mysql_self.cc
index c63c0e2..2c79caf 100644
--- a/glom/libglom/connectionpool_backends/mysql_self.cc
+++ b/glom/libglom/connectionpool_backends/mysql_self.cc
@@ -632,7 +632,7 @@ Glib::RefPtr<Gnome::Gda::Connection> MySQLSelfHosted::connect(const Glib::ustrin
       }
       else
       {
-        throw ex;
+        throw;
       }
     }
 
diff --git a/glom/libglom/connectionpool_backends/postgres_self.cc 
b/glom/libglom/connectionpool_backends/postgres_self.cc
index 14e066c..a188de9 100644
--- a/glom/libglom/connectionpool_backends/postgres_self.cc
+++ b/glom/libglom/connectionpool_backends/postgres_self.cc
@@ -508,7 +508,7 @@ Glib::RefPtr<Gnome::Gda::Connection> PostgresSelfHosted::connect(const Glib::ust
       }
       else
       {
-        throw ex;
+        throw;
       }
     }