surround: Fix two issues with the haas surround code.

 1) Handle ID 0 is legal
 2) Make sure handle is initialized before trying to memset its buffer

Change-Id: I91db157863800c01dd9b92bc05a1df5c4fe0e95b

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/rbcodec/dsp/surround.c b/lib/rbcodec/dsp/surround.c
index 1a24d615fc..986d81ae6f 100644
--- a/lib/rbcodec/dsp/surround.c
+++ b/lib/rbcodec/dsp/surround.c
@@ -78,7 +78,8 @@ static void surround_buffer_free(void)
 
 static void dsp_surround_flush(void)
 {
-    memset(core_get_data(handle), 0, SURROUND_BUFSIZE);
+    if (handle >= 0)
+        memset(core_get_data(handle), 0, SURROUND_BUFSIZE);
 }
 
 static void surround_update_filter(unsigned int fout)
@@ -121,7 +122,7 @@ void dsp_surround_set_cutoff(int frq_l, int frq_h)
 
 static void surround_set_stepsize(int surround_strength)
 {
-    if (handle > 0)
+    if (handle >= 0)
         dsp_surround_flush();
 
     switch(surround_strength)