newlib: don't report EOF as error from OS layer, higher layer detects EOF as zero-length read

git-svn-id: svn://kolibrios.org@5204 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/libc/sys/ioread.c

@@ -26,6 +26,6 @@ int read_file(const char *path, void *buff,
     "addl $28, %%esp \n\t"
     :"=a" (retval)
     :"a"(path),"b"(buff),"c"(offset),"d"(count),"S"(reads));
-    return retval;
+    return retval == 6 ? 0 : retval;
 };