Add O3 optimization

Makefile

@@ -2,7 +2,7 @@ MultiThread = Yes
 
 PROGNAME = torrent-verify
 CC = cc
-CFLAGS = -Wall -std=gnu99 -I./subm/heapless-bencode -Werror
+CFLAGS = -Wall -std=gnu99 -I./subm/heapless-bencode -Werror -O3
 CPPFLAGS = -DPROGRAM_NAME='"$(PROGNAME)"' -DBUILD_INFO \
 		   -DBUILD_HASH="\"`git rev-parse --abbrev-ref HEAD` -> `git rev-parse --short HEAD`\"" -DBUILD_DATE="\"`date -I`\""
 

src/metainfo.c

@@ -17,7 +17,7 @@
 static int metainfo_read(const char* path, char** out_contents, int* out_size) {
     int ret = 0;
     FILE* f = NULL;
-    long size;
+    long size = 0;
     char* contents = NULL, *curr_contents = NULL;
     size_t read;