Fix bug: missing parentheses in logical expression (#275)

This results in GGGGGGGGGGGGG when generating with
mla = 3, fa = 0.

Co-authored-by: Iwan Kawrakow <iwan.kawrakow@gmail.com>

Author: ikawrakow

src/llama.cpp

@@ -13869,7 +13869,7 @@ struct llm_build_context {
                         ggml_tensor * q = ggml_concat(ctx0, q_nope2, ggml_permute(ctx0, q_rope, 0, 2, 1, 3), 0);
                         cb(q, "q", il);
 
-                        if (lctx.cparams.flash_attn && lctx.cparams.mla_attn == 1 || lctx.cparams.mla_attn == 3) {
+                        if (lctx.cparams.flash_attn && (lctx.cparams.mla_attn == 1 || lctx.cparams.mla_attn == 3)) {
                             ggml_tensor * kv_cache_lora = ggml_view_2d(ctx0, kv_self.kv_l[il],
                                     kv_lora_rank, n_kv,
                                     ggml_row_size(kv_self.kv_l[il]->type, kv_lora_rank + n_embd_head_qk_rope), 0);