Stylistic change only (added "do { ... } while( 0 )" around multi-statement macros)

git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@564 7f0cb862-5218-0410-a997-914c9d46530a

freeglut/freeglut/src/freeglut_callbacks.c

@@ -34,9 +34,12 @@
  * All of the callbacks setting methods can be generalized to this:
  */
 #define SET_CALLBACK(a)                                  \
+do                                                       \
+{                                                        \
     if( fgStructure.Window == NULL )                     \
         return;                                          \
-    SET_WCB( ( *( fgStructure.Window ) ), a, callback );
+    SET_WCB( ( *( fgStructure.Window ) ), a, callback ); \
+} while( 0 )
 
 /*
  * Sets the Display callback for the current window

freeglut/freeglut/src/freeglut_internal.h

@@ -381,7 +381,7 @@ do                                                             \
 {                                                              \
     if( FETCH_WCB( window, cbname ) != func )                  \
         (((window).CallBacks[CB_ ## cbname]) = (void *) func); \
-} while( 0 )                                                   \
+} while( 0 )
 
 /*
  * FETCH_WCB() is used as: