oleaut32: res50 is number of impinfos. Fix its usage.

dlls/oleaut32/typelib.h

@@ -79,7 +79,7 @@ typedef struct tagMSFT_Header {
         INT   res44;            /* unknown always: 0x20 (guid hash size?) */
         INT   res48;            /* unknown always: 0x80 (name hash size?) */
         INT   dispatchpos;      /* HREFTYPE to IDispatch, or -1 if no IDispatch */
-/*0x50*/INT   res50;            /* is zero becomes one when an interface is derived */
+/*0x50*/INT   nimpinfos;        /* number of impinfos */
 } MSFT_Header;
 
 /* segments in the type lib file have a structure like this: */

dlls/oleaut32/typelib2.c

@@ -232,7 +232,7 @@ static void ctl2_init_header(
     This->typelib_header.res44 = 0x20;
     This->typelib_header.res48 = 0x80;
     This->typelib_header.dispatchpos = -1;
-    This->typelib_header.res50 = 0;
+    This->typelib_header.nimpinfos = 0;
 }
 
 /****************************************************************************
@@ -677,6 +677,8 @@ static int ctl2_alloc_importinfo(
 	}
     }
 
+    impinfo->flags |= This->typelib_header.nimpinfos++;
+
     offset = ctl2_alloc_segment(This, MSFT_SEG_IMPORTINFO, sizeof(MSFT_ImpInfo), 0);
     if (offset == -1) return -1;
 
@@ -1252,7 +1254,6 @@ static HRESULT WINAPI ICreateTypeInfo2_fnSetTypeFlags(ICreateTypeInfo2 *iface, U
 	ctl2_alloc_importinfo(This->typelib, &impinfo);
 
 	This->typelib->typelib_header.dispatchpos = 1;
-	This->typelib->typelib_header.res50 = 1;
 
 	This->typeinfo->typekind |= 0x10;
 	This->typeinfo->typekind &= ~0x0f;