gallium/radeon: add an assertion to texture_transfer_map for app bugs
gallium/radeon: add an assertion to texture_transfer_map for app bugs

Tested-by: Kai Wasserbäch <31ea678c44dc4e8e22ccfd165592dd71a30e46ae@dev.carbon-project.org>
Reviewed-by: Kai Wasserbäch <31ea678c44dc4e8e22ccfd165592dd71a30e46ae@dev.carbon-project.org>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler