Avoid HeapReAlloc of a NULL pointer.

dlls/kernel/ne_segment.c

@@ -824,11 +824,17 @@ struct ne_init_list
 
 static void add_to_init_list( struct ne_init_list *list, NE_MODULE *hModule )
 {
+    NE_MODULE **newModule = NULL;
     if ( list->count == list->size )
     {
         int newSize = list->size + 128;
-        NE_MODULE **newModule = HeapReAlloc( GetProcessHeap(), 0,
+
+	if (list->module) 
+            newModule = HeapReAlloc( GetProcessHeap(), 0,
                                              list->module, newSize*sizeof(NE_MODULE *) );
+	else
+            newModule = HeapAlloc( GetProcessHeap(), 0,
+                                             newSize*sizeof(NE_MODULE *) );
         if ( !newModule )
         {
             FIXME_(dll)("Out of memory!");

dlls/winedos/vga.c

@@ -665,9 +665,13 @@ void VGA_PrepareVideoMemCopy(unsigned Xres, unsigned Yres)
     /*
      * Allocate space for char + attr.
      */
-    vga_text_old = HeapReAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, 
-                                vga_text_old, Xres * Yres * 2 );
 
+    if (vga_text_old)
+        vga_text_old = HeapReAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, 
+                                vga_text_old, Xres * Yres * 2 );
+    else
+        vga_text_old = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, 
+                                 Xres * Yres * 2 );
     p = VGA_AlphaBuffer();
     p2 = vga_text_old;
 

files/directory.c

@@ -723,7 +723,12 @@ static BOOL DIR_SearchSemicolonedPaths(LPCWSTR name, DOS_FULL_NAME *full_name, L
 
 	if (newlen > currlen)
 	{
-            if (!(buffer = HeapReAlloc( GetProcessHeap(), 0, buffer, newlen * sizeof(WCHAR))))
+	    if (buffer) 
+                buffer = HeapReAlloc( GetProcessHeap(), 0, buffer, newlen * sizeof(WCHAR));
+	    else
+                buffer = HeapAlloc( GetProcessHeap(), 0, newlen * sizeof(WCHAR));
+
+	    if(!buffer)
                 goto done;
 	    currlen = newlen;
 	}