Add #ifdef guard for CUuuid_st

With the CUDA 10 SDK, this type can get redefined when including
full cuda headers. Strangely, nvidia seem to have expected this
and have an #ifdef convention in place already. We need to respect
that.

Author: philipl

ffnvcodec.pc.in

@@ -3,5 +3,5 @@ includedir=${prefix}/include
 
 Name: ffnvcodec
 Description: FFmpeg version of Nvidia Codec SDK headers
-Version: 8.2.15.3
+Version: 8.2.15.4
 Cflags: -I${includedir}

include/ffnvcodec/dynlink_cuda.h

@@ -108,9 +108,12 @@ typedef enum CUexternalSemaphoreHandleType_enum {
     CU_EXTERNAL_SEMAPHORE_HANDLE_TYPE_D3D12_FENCE      = 4
 } CUexternalSemaphoreHandleType;
 
+#ifndef CU_UUID_HAS_BEEN_DEFINED
+#define CU_UUID_HAS_BEEN_DEFINED
 typedef struct CUuuid_st {
     char bytes[16];
 } CUuuid;
+#endif
 
 typedef struct CUDA_MEMCPY2D_st {
     size_t srcXInBytes;