progs: Check the number of configs returned by eglChooseConfig.

A successful eglChooseConfig call does not imply there are valid
configs.

Signed-off-by: Chia-I Wu <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/progs/openvg/trivial/eglcommon.c b/progs/openvg/trivial/eglcommon.c
index dcec1ac4a47..0316e596c69 100644
--- a/progs/openvg/trivial/eglcommon.c
+++ b/progs/openvg/trivial/eglcommon.c
@@ -61,13 +61,13 @@ make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
    scrnum = DefaultScreen( x_dpy );
    root = RootWindow( x_dpy, scrnum );
 
-   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
+   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs) ||
+       !num_configs) {
       printf("Error: couldn't get an EGL visual config\n");
       exit(1);
    }
 
    assert(config);
-   assert(num_configs > 0);
 
    if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
       printf("Error: eglGetConfigAttrib() failed\n");