glx: Allow glXSwapInterval(0) when vblank_mode=0.

There's no reason to say no in this case.

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 18542d182016f37ba3ff38bb72b30b5bc443bbc8..07a3384d0abe1f3eae78bed8dbf99ee933ecf0c0 100644 (file)
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -830,7 +830,9 @@ dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 
    switch (vblank_mode) {
    case DRI_CONF_VBLANK_NEVER:
-      return GLX_BAD_VALUE;
+      if (interval != 0)
+         return GLX_BAD_VALUE;
+      break;
    case DRI_CONF_VBLANK_ALWAYS_SYNC:
       if (interval <= 0)
         return GLX_BAD_VALUE;