vm: cleanup in os-genunix.cpp

vm/os-genunix.cpp

@@ -26,12 +26,7 @@ const char *default_image_path()
 	if(!path)
 		return "factor.image";
 
-	/* We can't call strlen() here because with gcc 4.1.2 this
-	causes an internal compiler error. */
-	int len = 0;
-	const char *iter = path;
-	while(*iter) { len++; iter++; }
-
+	int len = strlen(path);
 	char *new_path = new char[PATH_MAX + SUFFIX_LEN + 1];
 	memcpy(new_path,path,len + 1);
 	memcpy(new_path + len,SUFFIX,SUFFIX_LEN + 1);