all: use designated initializers for AVOption.unit

Makes it robust against adding fields before it, which will be useful in
following commits.

Majority of the patch generated by the following Coccinelle script:

@@
typedef AVOption;
identifier arr_name;
initializer list il;
initializer list[8] il1;
expression tail;
@@
AVOption arr_name[] = { il, { il1,
- tail
+ .unit = tail
}, ...  };

with some manual changes, as the script:
* has trouble with options defined inside macros
* sometimes does not handle options under an #else branch
* sometimes swallows whitespace

1 files changed, 3 insertions, 3 deletions

diff --git a/libavfilter/vf_shear.c b/libavfilter/vf_shear.c
index 5d43809ccd..5008db3f46 100644
--- a/libavfilter/vf_shear.c
+++ b/libavfilter/vf_shear.c
@@ -64,9 +64,9 @@ static const AVOption shear_options[] = {
     { "shy",       "set y shear factor",        OFFSET(shy),           AV_OPT_TYPE_FLOAT,  {.dbl=0.},     -2, 2, .flags=FLAGS },
     { "fillcolor", "set background fill color", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, 0, 0, .flags=FLAGS },
     { "c",         "set background fill color", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, 0, 0, .flags=FLAGS },
-    { "interp",    "set interpolation",         OFFSET(interp),        AV_OPT_TYPE_INT,    {.i64=1},       0, 1, .flags=FLAGS, "interp" },
-    {  "nearest",  "nearest neighbour",         0,                     AV_OPT_TYPE_CONST,  {.i64=0},       0, 0, .flags=FLAGS, "interp" },
-    {  "bilinear", "bilinear",                  0,                     AV_OPT_TYPE_CONST,  {.i64=1},       0, 0, .flags=FLAGS, "interp" },
+    { "interp",    "set interpolation",         OFFSET(interp),        AV_OPT_TYPE_INT,    {.i64=1},       0, 1, .flags=FLAGS, .unit = "interp" },
+    {  "nearest",  "nearest neighbour",         0,                     AV_OPT_TYPE_CONST,  {.i64=0},       0, 0, .flags=FLAGS, .unit = "interp" },
+    {  "bilinear", "bilinear",                  0,                     AV_OPT_TYPE_CONST,  {.i64=1},       0, 0, .flags=FLAGS, .unit = "interp" },
     { NULL }
 };