nir: nir opt_shrink_vectors whitespace fix

Signed-off-by: Pavel Ondračka <pavel.ondracka@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21014>

src/compiler/nir/nir_opt_shrink_vectors.c

@@ -322,7 +322,7 @@ opt_shrink_vectors_load_const(nir_load_const_instr *instr)
       /* Otherwise, just append the value */
       if (j == num_components) {
          instr->value[num_components] = instr->value[i];
-	 if (i != num_components)
+         if (i != num_components)
             progress = true;
          reswizzle[i] = num_components++;
       }