Validate `context` before use in ValidateStreamConsumerGLTextureExternalAttribsNV.

src/libANGLE/validationEGL.cpp

@@ -2860,6 +2860,8 @@ Error ValidateStreamConsumerGLTextureExternalAttribsNV(const Display *display,
         return EglBadAccess() << "Stream consumer extension not active";
     }
 
+    ANGLE_TRY(ValidateContext(display, context));
+
     // Although technically not a requirement in spec, the context needs to be checked for support
     // for external textures or future logic will cause assertations. This extension is also
     // effectively useless without external textures.
@@ -2873,13 +2875,6 @@ Error ValidateStreamConsumerGLTextureExternalAttribsNV(const Display *display,
         return EglBadStream() << "Invalid stream";
     }
 
-    if (!context)
-    {
-        return EglBadAccess() << "No GL context current to calling thread.";
-    }
-
-    ANGLE_TRY(ValidateContext(display, context));
-
     if (stream->getState() != EGL_STREAM_STATE_CREATED_KHR)
     {
         return EglBadState() << "Invalid stream state";