egl: Allow binding to any client API.

As a result, EGL_NONE is no longer a valid client API.  And it is
possible that no config supports the current bound API.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
diff --git a/src/egl/main/eglcurrent.c b/src/egl/main/eglcurrent.c
index 4431f96..ca7a077 100644
--- a/src/egl/main/eglcurrent.c
+++ b/src/egl/main/eglcurrent.c
@@ -9,7 +9,7 @@
 
 /* This should be kept in sync with _eglInitThreadInfo() */
 #define _EGL_THREAD_INFO_INITIALIZER \
-   { EGL_SUCCESS, { NULL }, 1 }
+   { EGL_SUCCESS, { NULL }, 0 }
 
 /* a fallback thread info to guarantee that every thread always has one */
 static _EGLThreadInfo dummy_thread = _EGL_THREAD_INFO_INITIALIZER;