Buffer is an array of bytes so define it as such

Author: jackun

src/amdgpu.cpp

@@ -52,8 +52,8 @@ bool amdgpu_verify_metrics(const std::string& path)
 #define IS_VALID_METRIC(FIELD) (FIELD != 0xffff)
 void amdgpu_get_instant_metrics(struct amdgpu_common_metrics *metrics) {
 	FILE *f;
-	void *buf[MAX(sizeof(struct gpu_metrics_v1_3), sizeof(struct gpu_metrics_v2_3))/sizeof(void*)+1];
-	struct metrics_table_header* header = (metrics_table_header*)buf;
+	char buf[MAX(sizeof(struct gpu_metrics_v1_3), sizeof(struct gpu_metrics_v2_3))];
+	struct metrics_table_header* header = reinterpret_cast<metrics_table_header*>(buf);
 
 	f = fopen(metrics_path.c_str(), "rb");
 	if (!f)