Codechange: Replace SmallPair with std::pair.

std::pair is already the smallest possible pair, and it already handles non-POD types correctly.

src/newgrf_text.cpp

@@ -196,7 +196,7 @@ struct UnmappedChoiceList : ZeroedMemoryAllocator {
 	/** Clean everything up. */
 	~UnmappedChoiceList()
 	{
-		for (SmallPair<byte, char *> p : this->strings) {
+		for (std::pair<byte, char *> p : this->strings) {
 			free(p.second);
 		}
 	}