time: detect when spawn fails

In the 64-bit build the time applet reported garbage when it was
unable to run the program to be timed.

The error return from mingw_spawn_pid() was incorrect.

1 files changed, 1 insertions, 1 deletions

diff --git a/win32/process.c b/win32/process.c
index 5833a0323..54628acad 100644
--- a/win32/process.c
+++ b/win32/process.c
@@ -370,7 +370,7 @@ mingw_spawn_pid(int mode, char **argv)
 
         ret = mingw_spawn_1(mode, argv[0], (char *const *)argv, environ);
 
-        return ret == -1 ? -1 : GetProcessId((HANDLE)ret);
+        return ret == -1 ? (pid_t)-1 : (pid_t)GetProcessId((HANDLE)ret);
 }
 
 pid_t FAST_FUNC