The vulkan backend crashes on Android with Adreno 830

[AndreyPavlenko]

Seems there is a null pointer passed to vkCmdBindPipeline()

/vendor/lib/hw/vulkan.adreno.so (qglinternal::vkCmdBindPipeline(VkCommandBuffer_T*, VkPipelineBindPoint, VkPipeline_T*)+) ()
XXbase.apk!libwhisper_jni.so (offset XX) (ggml_backend_vk_graph_compute(ggml_backend*, ggml_cgraph*)+) ()
XXbase.apk!libwhisper_jni.so (offset XX) (ggml_backend_sched_graph_compute+) ()
XXbase.apk!libwhisper_jni.so (offset XX) (ggml_graph_compute_helper(ggml_backend_sched*, ggml_cgraph*, int, bool)+) ()
XXbase.apk!libwhisper_jni.so (offset XX) (whisper_decode_internal(whisper_context&, whisper_state&, whisper_batch const&, int, bool, bool (*)(void*), void*)+) ()
XXbase.apk!libwhisper_jni.so (offset XX) (whisper_full_with_state+) ()
XXbase.apk!libwhisper_jni.so (offset XX) (whisper_full+) ()