Fix "strict aliasing rules" warnings

Treated as errors when trying to build the test_app_server for x86_64.

headers/os/interface/GraphicsDefs.h

@@ -19,7 +19,9 @@ typedef struct pattern {
 inline bool
 operator==(const pattern& a, const pattern& b)
 {
-	return (*(uint64*)a.data == *(uint64*)b.data);
+	uint64* pa = (uint64*)a.data;
+	uint64* pb = (uint64*)b.data;
+	return (*pa == *pb);
 }
 
 

src/kits/shared/SHA256.cpp

@@ -114,8 +114,8 @@ SHA256::Digest()
 		}
 
 		// write the (big-endian) message size in bits
-		*(uint64*)((uint8*)fBuffer + kChunkSize - 8)
-			= B_HOST_TO_BENDIAN_INT64((uint64)fMessageSize * 8);
+		uint64* target = (uint64*)((uint8*)fBuffer + kChunkSize - 8);
+		*target = B_HOST_TO_BENDIAN_INT64((uint64)fMessageSize * 8);
 
 		_ProcessChunk();