changed copy_rows_fromd_by_idx a bit to make it clearer

1 files changed, 2 insertions, 2 deletions

diff --git a/nerv/matrix/generic/cumatrix.c b/nerv/matrix/generic/cumatrix.c
index 623352e..f675149 100644
--- a/nerv/matrix/generic/cumatrix.c
+++ b/nerv/matrix/generic/cumatrix.c
@@ -247,8 +247,8 @@ static int nerv_matrix_(lua_copy_rows_fromd_by_idx)(lua_State *L) {
     const Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
     const Matrix *idx = luaT_checkudata(L, 3, nerv_matrix_(tname));
     long nrow = a->nrow;
-    int b_begin = lua_gettop(L) > 3 ? luaL_checkinteger(L, 4) : 0;
-    nerv_matrix_(copy_rows_fromd_by_idx)(a, b, idx, b_begin, &status);
+    int idx_begin = lua_gettop(L) > 3 ? luaL_checkinteger(L, 4) : 0;
+    nerv_matrix_(copy_rows_fromd_by_idx)(a, b, idx, idx_begin, &status);
     NERV_LUA_CHECK_STATUS(L, status);
     return 0;
 }