Re: -getRed:green:blue:alpha: not defined for the NSColor

[Keith David Bershatsky]

The following change made with 9624f609493da7c08016ba00d6895bad0fe26a0e is what 
prevents Emacs on OSX 10.6.8 from working.  Would it be possible for the Emacs 
team to put in a condition that permits Emacs on OSX 10.6 to use the two lines 
of code that were removed?  [I do not know what is the earliest version of OSX 
that can make use of two new lines of code without breaking.]

diff --git a/src/nsimage.m b/src/nsimage.m
index 33236c4..0249d22 100644
--- a/src/nsimage.m
+++ b/src/nsimage.m
@@ -313,8 +313,8 @@ - (instancetype)setXBMColor: (NSColor *)color
   if (bmRep == nil || color == nil)
     return self;
 
-  if ([color colorSpaceName] != NSCalibratedRGBColorSpace)
-    rgbColor = [color colorUsingColorSpaceName: NSCalibratedRGBColorSpace];
+  if ([color colorSpace] != [NSColorSpace deviceRGBColorSpace])
+    rgbColor = [color colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
   else
     rgbColor = color;