use memcpy to avoid misaligned pointer UB

compiles to the same thing before/after at any optimization level

Author: chearon

src/bmp/BMPParser.cc

@@ -1,6 +1,7 @@
 #include "BMPParser.h"
 
 #include <cassert>
+#include <cstring>
 
 using namespace std;
 using namespace BMPParser;
@@ -384,7 +385,8 @@ string Parser::getErrMsg() const{
 template <typename T, bool check> inline T Parser::get(){
  if(check)
  CHECK_OVERRUN(ptr, sizeof(T), T);
- T val = *(T*)ptr;
+ T val;
+ std::memcpy(&val, ptr, sizeof(T));
  ptr += sizeof(T);
  return val;
 }