Additional efforts to get it to build on WinCE. (CVS 2875)

FossilOrigin-Name: b45c076f0d5f7c863287ccb5703c492e1010a99d

src/os_win.c

@@ -643,6 +643,13 @@ static int winFileSize(OsFile *id, i64 *pSize){
   return SQLITE_OK;
 }
 
+/*
+** LOCKFILE_FAIL_IMMEDIATELY is undefined on some Windows systems.
+*/
+#ifndef LOCKFILE_FAIL_IMMEDIATELY
+# define LOCKFILE_FAIL_IMMEDIATELY 1
+#endif
+
 /*
 ** Acquire a reader lock.
 ** Different API routines are called depending on whether or not this