Fix "epoxy_egl_get_current_gl_context_api" to use "eglQueryContext" with "EGL_CONTEXT_CLIENT_TYPE" as "attribute".

src/dispatch_common.c

@@ -542,31 +542,13 @@ epoxy_get_core_proc_address(const char *name, int core_version)
 static EGLenum
 epoxy_egl_get_current_gl_context_api(void)
 {
-    EGLenum save_api = eglQueryAPI();
-    EGLContext ctx;
-
-    if (eglBindAPI(EGL_OPENGL_API)) {
-        ctx = eglGetCurrentContext();
-        if (ctx) {
-            eglBindAPI(save_api);
-            return EGL_OPENGL_API;
-        }
-    } else {
-        (void)eglGetError();
-    }
-
-    if (eglBindAPI(EGL_OPENGL_ES_API)) {
-        ctx = eglGetCurrentContext();
-        eglBindAPI(save_api);
-        if (ctx) {
-            eglBindAPI(save_api);
-            return EGL_OPENGL_ES_API;
-        }
-    } else {
-        (void)eglGetError();
-    }
-
-    return EGL_NONE;
+    EGLDisplay eglDisplay = eglGetCurrentDisplay();
+    EGLContext eglContext = eglGetCurrentContext();
+    EGLint eglContextClientType = EGL_NONE;
+    return      eglQueryContext(eglDisplay, eglContext, EGL_CONTEXT_CLIENT_TYPE,
+                                &eglContextClientType) == EGL_TRUE
+           ?    (EGLenum)eglContextClientType
+           :    EGL_NONE;
 }
 #endif /* EPOXY_SUPPORT_EGL */