sun_mouse: Fix -Wnull-dereference warning

sun_mouse.c: In function ‘vuidReadInput’:
sun_mouse.c:291:10: warning: potential null pointer dereference [-Wnull-dereference]
     pBuf = pVuidMse->buffer;
     ~~~~~^~~~~~~~~~~~~~~~~~

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/sun_mouse.c b/src/sun_mouse.c
index 8328c46..3b362c5 100644
--- a/src/sun_mouse.c
+++ b/src/sun_mouse.c
@@ -286,10 +286,13 @@ vuidReadInput(InputInfoPtr pInfo)
     Bool absXset = FALSE, absYset = FALSE;
 
     pMse = pInfo->private;
-    pVuidMse = getVuidMsePriv(pInfo);
     buttons = pMse->lastButtons;
+    pVuidMse = getVuidMsePriv(pInfo);
+    if (pVuidMse == NULL) {
+        xf86Msg(X_ERROR, "%s: cannot locate VuidMsePtr\n", pInfo->name);
+        return;
+    }
     pBuf = pVuidMse->buffer;
-    n = 0;
 
     do {
         n = read(pInfo->fd, pBuf, sizeof(Firm_event));