Correctly process and indicate error from LoadLibraryExA() function
Correctly process and indicate error from LoadLibraryExA() function

Function save_err_str() checks for error by GetLastError() call. Calling
EnumProcessModules() may change or reset it. So call save_err_str()
immediately after LoadLibraryExA().

dlfcn-win32/dlfcn-win32,dlfcn-win32/dlfcn-win32