odbc32: Declare a function static

[Andrew Talbot]

Changelog:
    odbc32: Declare a function static.

diff -urN a/dlls/odbc32/proxyodbc.c b/dlls/odbc32/proxyodbc.c
--- a/dlls/odbc32/proxyodbc.c	2006-10-10 12:51:36.000000000 +0100
+++ b/dlls/odbc32/proxyodbc.c	2007-01-18 19:49:48.000000000 +0000
@@ -156,7 +156,7 @@
         } \
 }
 
-SQLRETURN SQLDummyFunc(void)
+static SQLRETURN SQLDummyFunc(void)
 {
     TRACE("SQLDummyFunc:\n");
     return SQL_SUCCESS;