Fixed build.

src/bgfx_p.h

@@ -953,7 +953,7 @@ namespace bgfx
 	};
 
 	//
-	constexpr uint8_t  kSortKeyViewNumBits         = 31 - bx::uint32_cntlz(BGFX_CONFIG_MAX_VIEWS);
+	constexpr uint8_t  kSortKeyViewNumBits         = uint8_t(31 - bx::uint32_cntlz(BGFX_CONFIG_MAX_VIEWS) );
 	constexpr uint8_t  kSortKeyViewBitShift        = 64-kSortKeyViewNumBits;
 	constexpr uint64_t kSortKeyViewMask            = uint64_t(BGFX_CONFIG_MAX_VIEWS-1)<<kSortKeyViewBitShift;
 
@@ -1243,7 +1243,7 @@ namespace bgfx
 		{
 			const uint32_t view = (uint32_t(m_view) << kBlitKeyViewShift) & kBlitKeyViewMask;
 			const uint32_t item = (uint32_t(m_item) << kBlitKeyItemShift) & kBlitKeyItemMask;
-			const uint64_t key  = view|item;
+			const uint32_t key  = view|item;
 
 			return key;
 		}