Only free gains if they were alloc'd

git-svn-id: http://svn.digium.com/svn/zaptel/trunk@178 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 2 insertions, 1 deletions

diff --git a/zaptel.c b/zaptel.c
index 141ca96..207fe94 100755
--- a/zaptel.c
+++ b/zaptel.c
@@ -2499,7 +2499,8 @@ static int zt_common_ioctl(struct inode *node, struct file *file, unsigned int c
 		    !memcmp(chans[i]->txgain, defgain, 256)) {
 			/* This is really just a normal gain, so 
 			   deallocate the memory and go back to defaults */
-			kfree(chans[i]->rxgain);
+			if (chans[i]->gainalloc)
+				kfree(chans[i]->rxgain);
 			chans[i]->rxgain = defgain;
 			chans[i]->txgain = defgain;
 			chans[i]->gainalloc = 0;