Fixed compiler warnings

macosx/ContextOutlineView.m

@@ -15,7 +15,21 @@
             if ([delegate respondsToSelector:@selector(outlineView:shouldSelectItem:)] && [delegate outlineView:self shouldSelectItem:item])
                 [self selectRow:rowIndex byExtendingSelection:NO];
             if ([delegate respondsToSelector:@selector(outlineView:contextMenuForItem:)])
-                return [delegate outlineView:self contextMenuForItem:item];
+            {
+                SEL sel = @selector(outlineView:contextMenuForItem:);
+                NSInvocation *invoc = [NSInvocation invocationWithMethodSignature:
+                    [delegate methodSignatureForSelector: sel]];
+                if (invoc)
+                {
+                    NSMenu *result;
+                    [invoc setSelector: sel];
+                    [invoc setArgument: &self atIndex: 2];
+                    [invoc setArgument: &item atIndex: 3];
+                    [invoc invokeWithTarget: delegate];
+                    [invoc getReturnValue: &result];
+                    return result;
+                }
+            }
         }
     } else {
         [self deselectAll:self];

macosx/MacInputWatcher.mm

@@ -68,7 +68,15 @@ public:
     BOOL hasMarkedText = NO;
     if ([aTextObject respondsToSelector: @selector(hasMarkedText)])
     {
-        hasMarkedText = [aTextObject performSelector: @selector(hasMarkedText)];
+        SEL sel = @selector(hasMarkedText);
+        NSInvocation *invoc = [NSInvocation invocationWithMethodSignature:
+            [aTextObject methodSignatureForSelector: sel]];
+        if (invoc)
+        {
+            [invoc setSelector:      sel];
+            [invoc invokeWithTarget: aTextObject];
+            [invoc getReturnValue:   &hasMarkedText];
+        }
     }
     
     [[aTextObject window] makeKeyAndOrderFront: nil];

macosx/NSOutlineView_Extensions.m

@@ -60,7 +60,7 @@
 }
 
 - (void)selectItems:(NSArray*)items byExtendingSelection:(BOOL)extend {
-    int i;
+    unsigned i;
     if (extend==NO) [self deselectAll:nil];
     for (i=0;i<[items count];i++) {
         int row = [self rowForItem:[items objectAtIndex:i]];