Implemented [GSResolutionForScreen:] with code from NSScreen.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@11858 72102866-910b-0410-8b05-ffd578937521

Source/NSGraphicsContext.m

@@ -1000,6 +1000,8 @@ NSGraphicsContext	*GSCurrentContext()
     GET_IMP(@selector(GSWindowDepthForScreen:));
   methodTable.GSAvailableDepthsForScreen_ = 
     GET_IMP(@selector(GSAvailableDepthsForScreen:));
+  methodTable.GSResolutionForScreen_ = 
+    GET_IMP(@selector(GSResolutionForScreen:));
 
   mptr = NSZoneMalloc(_globalGSZone, sizeof(gsMethodTable));
   memcpy(mptr, &methodTable, sizeof(gsMethodTable));
@@ -2727,4 +2729,11 @@ NSGraphicsContext	*GSCurrentContext()
   return NULL;
 }
 
+- (NSSize) GSResolutionForScreen: (int) screen
+{
+  // This is a fixed value for screens.
+  // All screens I checked under OS4.2 report 72.
+  return NSMakeSize(72, 72);
+}
+
 @end