metal : fix API debug warnings

Author: ggerganov

ggml-metal.m

@@ -1238,7 +1238,7 @@ void ggml_metal_graph_compute(
                                 // not sure how to avoid this
                                 // TODO: make a simpler cpy_bytes kernel
 
-                                const int nth = MIN(1024, ne00);
+                                const int nth = MIN((int) ctx->pipeline_cpy_f32_f32.maxTotalThreadsPerThreadgroup, ne00);
 
                                 [encoder setComputePipelineState:ctx->pipeline_cpy_f32_f32];
                                 [encoder setBuffer:id_src0 offset:offs_src0        atIndex:0];
@@ -2239,7 +2239,7 @@ void ggml_metal_graph_compute(
                             [encoder setBytes:&nb3  length:sizeof(nb3)  atIndex:17];
                             [encoder setBytes:&sf   length:sizeof(sf)   atIndex:18];
 
-                            const int nth = MIN(1024, ne0);
+                            const int nth = MIN((int) ctx->pipeline_upscale_f32.maxTotalThreadsPerThreadgroup, ne0);
 
                             [encoder dispatchThreadgroups:MTLSizeMake(ne1, ne2, ne3) threadsPerThreadgroup:MTLSizeMake(nth, 1, 1)];
                         } break;

ggml-metal.metal

@@ -3523,7 +3523,7 @@ void dequantize_q8_0(device const block_q8_0 *xb, short il, thread type4x4 & reg
     device const int8_t * qs = ((device const int8_t *)xb->qs);
     const half d = xb->d;
 
-    for (int i=0;i<16;i++) {
+    for (int i = 0; i < 16; i++) {
         reg[i/4][i%4] = (qs[i + 16*il] * d);
     }
 }