Fix wrong REVISION value.

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@1670 ea778897-0a13-0410-b9d1-a72fbfd435f5

win32-config.h

@@ -322,7 +322,7 @@
    code using `volatile' can become incorrect without. Disable with care. */
 /* #undef volatile */
 
-#define REVISION "SVN"
+#define REVISION "-1"
 
 /* Define if you want to detect a running instance */
 #define HAVE_SOCKET 1