libCom/WIN32: Merged Jeff's fix for bug 717252

o Fixed race condition where win32 thread parm was not pushed onto the
  list before the thread was started, and so if the thread exits very
  quickly it can try to remove a non-existent thread parameter from
  the list.
o This impacts only win32.

src/libCom/osi/os/WIN32/osdThread.c

@@ -630,18 +630,21 @@ epicsShareFunc epicsThreadId epicsShareAPI epicsThreadCreate (const char *pName,
         free ( pParmWIN32 );
         return NULL;
     }
+    
+    EnterCriticalSection ( & pGbl->mutex );
+    ellAdd ( & pGbl->threadList, & pParmWIN32->node );
+    LeaveCriticalSection ( & pGbl->mutex );
 
     wstat =  ResumeThread ( pParmWIN32->handle );
     if (wstat==0xFFFFFFFF) {
+		    EnterCriticalSection ( & pGbl->mutex );
+		    ellDelete ( & pGbl->threadList, & pParmWIN32->node );
+		    LeaveCriticalSection ( & pGbl->mutex );
         CloseHandle ( pParmWIN32->handle ); 
         free ( pParmWIN32 );
         return NULL;
     }
 
-    EnterCriticalSection ( & pGbl->mutex );
-    ellAdd ( & pGbl->threadList, & pParmWIN32->node );
-    LeaveCriticalSection ( & pGbl->mutex );
-
     return ( epicsThreadId ) pParmWIN32;
 }