Fix some -Wmissing-declarations warnings.

include/odbcinst.h

diff --git a/include/odbcinst.h b/include/odbcinst.h
index f296172..aeef374 100644
--- a/include/odbcinst.h
+++ b/include/odbcinst.h
@@ -32,6 +32,8 @@
 BOOL WINAPI SQLConfigDriverW(HWND,WORD,LPCWSTR,LPCWSTR,LPWSTR,WORD,WORD*);
 BOOL WINAPI SQLCreateDataSource(HWND,LPCSTR);
 BOOL WINAPI SQLCreateDataSourceW(HWND,LPCWSTR);
+BOOL WINAPI SQLGetAvailableDrivers(LPCSTR,LPSTR,WORD,WORD*);
+BOOL WINAPI SQLGetAvailableDriversW(LPCWSTR,LPWSTR,WORD,WORD*);
 BOOL WINAPI SQLGetConfigMode(UWORD*);
 BOOL WINAPI SQLGetInstalledDrivers(LPSTR,WORD,WORD*);
 BOOL WINAPI SQLGetInstalledDriversW(LPWSTR,WORD,WORD*);
@@ -39,12 +41,16 @@
 int WINAPI SQLGetPrivateProfileStringW(LPCWSTR,LPCWSTR,LPCWSTR,LPCWSTR,int,LPCWSTR);
 BOOL WINAPI SQLGetTranslator(HWND,LPSTR,WORD,WORD*,LPSTR,WORD,WORD*,DWORD*);
 BOOL WINAPI SQLGetTranslatorW(HWND,LPWSTR,WORD,WORD*,LPWSTR,WORD,WORD*,DWORD*);
+BOOL WINAPI SQLInstallDriver(LPCSTR,LPCSTR,LPSTR,WORD,WORD*);
+BOOL WINAPI SQLInstallDriverW(LPCWSTR,LPCWSTR,LPWSTR,WORD,WORD*);
 BOOL WINAPI SQLInstallDriverEx(LPCSTR,LPCSTR,LPSTR,WORD,WORD*,WORD,LPDWORD);
 BOOL WINAPI SQLInstallDriverExW(LPCWSTR,LPCWSTR,LPWSTR,WORD,WORD*,WORD,LPDWORD);
 BOOL WINAPI SQLInstallDriverManager(LPSTR,WORD,WORD*);
 BOOL WINAPI SQLInstallDriverManagerW(LPWSTR,WORD,WORD*);
 SQLRETURN WINAPI SQLInstallerError(WORD,DWORD*,LPSTR,WORD,WORD*);
 SQLRETURN WINAPI SQLInstallerErrorW(WORD,DWORD*,LPWSTR,WORD,WORD*);
+BOOL WINAPI SQLInstallODBC(HWND,LPCSTR,LPCSTR,LPCSTR);
+BOOL WINAPI SQLInstallODBCW(HWND,LPCWSTR,LPCWSTR,LPCWSTR);
 BOOL WINAPI SQLInstallTranslatorEx(LPCSTR,LPCSTR,LPSTR,WORD,WORD*,WORD,LPDWORD);
 BOOL WINAPI SQLInstallTranslatorExW(LPCWSTR,LPCWSTR,LPWSTR,WORD,WORD*,WORD,LPDWORD);
 BOOL WINAPI SQLInstallTranslator(LPCSTR,LPCSTR,LPCSTR,LPSTR,WORD,WORD*,WORD,LPDWORD);