Change all `map_handle_err(map_free())` conditionals to `UNLIKELY` (`ifU()`), as it is unlikely an unmap will fail on a map that has already been established successfully.

Fortune for naka's current commit: Small blessing − 小吉

src/main.c

@@ -114,7 +114,7 @@ static int map_haystacks(const char* const * h, map_t maps[pOUT])
 			maps-=1;
 			ERROR("Failed to map file `%s', rolling back %lu maps. (erp: %p, prev: %p)", path, d, c, maps);
 			while( d --> 0 )
-				if(!map_handle_err(map_free(* (--maps)))) WARN("Failed to free map at %p (in %lu unwind)", maps, d);
+				ifU(!map_handle_err(map_free(* (--maps)))) WARN("Failed to free map at %p (in %lu unwind)", maps, d);
 			return 0;
 		}
 		d+=1;
@@ -151,7 +151,7 @@ inv_args:
 	TRACE("Attempting to map %lu haystacks", hsn);
 	if(!map_haystacks((const char**)(argv+1), haystacks)) {
 		// Unmap needle before return.	
-		if(!map_handle_err(map_free(needle))) WARN("Failed to unmap needle before exiting after failed haystack maps");
+		ifU(!map_handle_err(map_free(needle))) WARN("Failed to unmap needle before exiting after failed haystack maps");
 		return PROG_RET_MAP_HAYSTACK_FAILED;
 	}
 
@@ -177,11 +177,11 @@ inv_args:
 
 	for(int i=0;i<(int)hsn;i++) {
 		INFO("Unmapping haystack haystack file `%s' (#%d) (map addr %p)", argv[i+1], i+1, haystacks+i);
-		if(!map_handle_err(map_free(haystacks[i]))) m_rval = !m_rval ? PROG_RET_UNMAP_HAYSTACK_N_FAILED(i+1) : m_rval;
+		ifU(!map_handle_err(map_free(haystacks[i]))) m_rval = !m_rval ? PROG_RET_UNMAP_HAYSTACK_N_FAILED(i+1) : m_rval;
 	}
 	TRACE("Unmap haystacks ended with main rval: %d", m_rval);
 	INFO("Unmapping needle file `%s'", *argv);
-	if(!map_handle_err(map_free(needle))) m_rval = !m_rval ? PROG_RET_UNMAP_NEEDLE_FAILED : m_rval;
+	ifU(!map_handle_err(map_free(needle))) m_rval = !m_rval ? PROG_RET_UNMAP_NEEDLE_FAILED : m_rval;
 	TRACE("main end: rval %d", m_rval);
 	return m_rval;
 }