[dia] build: fix wrong runtime usage of wmf plug-in

[Hans Breuer <hans src gnome org>]

commit ff03e2c1cec015532cc9be0a1c26a72a8cd46408
Author: Hans Breuer <hans breuer org>
Date:   Thu Jun 9 21:30:24 2011 +0200

    build: fix wrong runtime usage of wmf plug-in
    
    The recent cleanup of plug-ins/makefile.msc did break the wmf plug-in
    by linking the static CRT. The result was bad-file-descriptor on final
    fwrite(), so that's now detected as well. Finally there is some
    preprocessor define to get a compile time error instead of producing
    a less obvious runtime error.

 plug-ins/makefile.msc |    2 ++
 plug-ins/wmf/wmf.cpp  |    8 +++++++-
 2 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/plug-ins/makefile.msc b/plug-ins/makefile.msc
index d4122fb..89eaa50 100644
--- a/plug-ins/makefile.msc
+++ b/plug-ins/makefile.msc
@@ -195,6 +195,8 @@ $(PACKAGE).dll : $(OBJECTS) $(PKG_DEF)
 	$(PKG_LINK) $(EXTRALIBS) user32.lib advapi32.lib wsock32.lib $(LDFLAGS) /def:$(PKG_DEF)
 $(PRJ_TOP)\config.h: $(PRJ_TOP)\config.h.win32
 	copy $(PRJ_TOP)\config.h.win32 $(PRJ_TOP)\config.h
+.cpp.obj :
+	$(CC) $(CFLAGS) -c $(PKG_CFLAGS) $<
 
 !ENDIF
 
diff --git a/plug-ins/wmf/wmf.cpp b/plug-ins/wmf/wmf.cpp
index 1697e44..c59883d 100644
--- a/plug-ins/wmf/wmf.cpp
+++ b/plug-ins/wmf/wmf.cpp
@@ -39,6 +39,11 @@
 #include "paginate_gdiprint.h"
 
 #if defined HAVE_WINDOWS_H || defined G_OS_WIN32
+#ifdef _MSC_VER
+#ifndef _DLL
+#error "fwrite will fail with wrong crt"
+#endif
+#endif
   namespace W32 {
    // at least Rectangle conflicts ...
 #  define WIN32_LEAN_AND_MEAN
@@ -300,7 +305,8 @@ end_render(DiaRenderer *self)
 	}
 
 	/* write file */
-	fwrite(pData,1,nSize,f);
+	if (fwrite(pData,1,nSize,f) != nSize)
+	  message_error (_("Couldn't write file %s\n%s"), renderer->sFileName, strerror(errno)); 
 	fclose(f);
     
 	g_free(pData);