Re-ran indent on all .c & .h source code files

Like so --
  find . -name "*.c" -or -name "*.h" -exec  indent -nbfda -npcs -npsl -bli0 --no-tabs {} \;

The `indent` invocation differs from the last one noted in
CHANGES.txt (from 2006!?), in that I've added "--no-tabs",
to ensure indents are all space-based.

src/rgblinear.c

@@ -43,11 +43,11 @@ unsigned char linear_to_sRGB(float linear)
 
   slot = linear * 4096.0 + 0.5;
   if (slot > 4095)
-    {
-      if (linear > 0.5)
-        slot = 4095;
-      else
-        slot = 0;
-    }
+  {
+    if (linear > 0.5)
+      slot = 4095;
+    else
+      slot = 0;
+  }
   return linear_to_sRGB_table[slot];
 }