use proper printf format specifiers for size_t and ptrdiff_t.

source/common/engine/stringtable.cpp

@@ -321,7 +321,7 @@ void FStringTable::LoadLanguage (int lumpnum, const char* buffer, size_t size)
 					}
 					else
 					{
-						sc.ScriptError ("The language code must be 2 or 3 characters long.\n'%s' is %lu characters long.",
+						sc.ScriptError ("The language code must be 2 or 3 characters long.\n'%s' is %zu characters long.",
 							sc.String, len);
 					}
 				}

source/common/filesystem/source/filesystem.cpp

@@ -1273,7 +1273,7 @@ void FileSystem::ReadFile (int lump, void *dest)
 
 	if (numread != size)
 	{
-		throw FileSystemException("W_ReadFile: only read %ld of %ld on '%s'\n",
+		throw FileSystemException("W_ReadFile: only read %td of %td on '%s'\n",
 			numread, size, FileInfo[lump].LongName);
 	}
 }

source/core/searchpaths.cpp

@@ -377,7 +377,7 @@ void SaveCRCs(TArray<FileEntry>& crclist)
 	{
 		for (auto& crc : crclist)
 		{
-			FStringf line("\"%s\" %llu %llu %u\n", crc.FileName.GetChars(), (long long)crc.FileLength, (long long)crc.FileTime, crc.CRCValue);
+			FStringf line("\"%s\" %zu %zu %u\n", crc.FileName.GetChars(), crc.FileLength, crc.FileTime, crc.CRCValue);
 			fw->Write(line.GetChars(), line.Len());
 		}
 		delete fw;