init the context on first call

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@935 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/src/rrd_not_thread_safe.c b/src/rrd_not_thread_safe.c
index 7022277..7b6a256 100644 (file)
--- a/src/rrd_not_thread_safe.c
+++ b/src/rrd_not_thread_safe.c
@@ -16,6 +16,7 @@
 
 static char rrd_error[MAXLEN+10];
 static char rrd_liberror[ERRBUFLEN+10];
+static int  rrd_context_init = 0;
 /* The global context is very useful in the transition period to even
    more thread-safe stuff, it can be used whereever we need a context
    and do not need to worry about concurrency. */
@@ -28,6 +29,11 @@ static struct rrd_context global_ctx = {
 /* #include <stdarg.h> */
 
 struct rrd_context *rrd_get_context(void) {
+    if (! rrd_context_init ){
+       rrd_context_init = 1;
+        global_ctx.rrd_error[0]='\0';
+        global_ctx.lib_errstr[0]='\0';
+    }
     return &global_ctx;
 }