ViewportSprite white texture

[antim0118]

Issue description (what happened, and what was expected):
It draws white texture when I try to render Viewport to ViewportSprite.

Editor:

In emulator, exported:

Project:
Menu_DEBUG.zip

Debug log:

...
28:34:790 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: Main: Load Scripts, Modules, Drivers
28:34:821 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: Main: Load Translations
28:34:822 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: Main: Done
28:34:822 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: setup
28:34:822 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: Running...
28:34:947 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: **ERROR**: At: core/rid.h:144:get() - Condition ' !elem ' is true. returned: __null
28:34:947 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: **ERROR**: At: platform/psp/rasterizer_psp.cpp:944:texture_set_flags() - Condition ' !texture ' is true.
28:34:947 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: **ERROR**: At: core/rid.h:144:get() - Condition ' !elem ' is true. returned: __null
28:34:948 user_main    I[SCEIO]: HLE\sceIo.cpp:1160 stdout: **ERROR**: At: platform/psp/rasterizer_psp.cpp:944:texture_set_flags() - Condition ' !texture ' is true.
28:34:972 user_main    I[FRAMEBUF]: Common\FramebufferManagerCommon.cpp:4 Creating FBO for 04000000 (z: 04110000) : 480 x 272 x 8888
28:34:973 user_main    W[SCEGE]: Common\FramebufferManagerCommon.cpp:443 FBO reusing depthbuffer, c=04000000/d=04110000 and c=04088000/d=04110000

[technicaljicama]

Yup, this is not implemented in the gles1 renderer. This whole repository will be deprecated soon anyway, replaced by something new.