SCI: Bugfix for kFileIOReadRaw

Avoid overwriting the target buffer with junk when no data has been read

1 files changed, 2 insertions, 1 deletions

diff --git a/engines/sci/engine/kfile.cpp b/engines/sci/engine/kfile.cpp
index af438bdaff..b1f85227c1 100644
--- a/engines/sci/engine/kfile.cpp
+++ b/engines/sci/engine/kfile.cpp
@@ -812,7 +812,8 @@ reg_t kFileIOReadRaw(EngineState *s, int argc, reg_t *argv) {
 	FileHandle *f = getFileFromHandle(s, handle);
 	if (f) {
 		bytesRead = f->_in->read(buf, size);
-		s->_segMan->memcpy(argv[1], (const byte*)buf, size);
+		if (bytesRead > 0)
+			s->_segMan->memcpy(argv[1], (const byte*)buf, size);
 	}
 
 	delete[] buf;