Removed variables that are set but never used.

Author: dlemstra

MagickCore/cache.c

@@ -5159,9 +5159,6 @@ static Quantum *SetPixelCacheNexusPixels(
 static MagickBooleanType SetCacheAlphaChannel(Image *image,const Quantum alpha,
   ExceptionInfo *exception)
 {
-  CacheInfo
-    *magick_restrict cache_info;
-
   CacheView
     *magick_restrict image_view;
 
@@ -5176,8 +5173,6 @@ static MagickBooleanType SetCacheAlphaChannel(Image *image,const Quantum alpha,
   if (IsEventLogging() != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   assert(image->cache != (Cache) NULL);
-  cache_info=(CacheInfo *) image->cache;
-  assert(cache_info->signature == MagickCoreSignature);
   image->alpha_trait=BlendPixelTrait;
   status=MagickTrue;
   image_view=AcquireVirtualCacheView(image,exception);  /* must be virtual */

MagickCore/draw.c

@@ -1258,9 +1258,6 @@ MagickExport MagickBooleanType DrawAffineImage(Image *image,
     SegmentInfo
       inverse_edge;
 
-    ssize_t
-      x_offset;
-
     if (status == MagickFalse)
       continue;
     inverse_edge=AffineEdge(source,&inverse_affine,(double) y,&edge);
@@ -1273,7 +1270,6 @@ MagickExport MagickBooleanType DrawAffineImage(Image *image,
       continue;
     pixel=zero;
     composite=zero;
-    x_offset=0;
     for (x=CastDoubleToLong(ceil(inverse_edge.x1-0.5));
          x <= CastDoubleToLong(floor(inverse_edge.x2+0.5)); x++)
     {
@@ -1289,7 +1285,6 @@ MagickExport MagickBooleanType DrawAffineImage(Image *image,
       CompositePixelInfoOver(&pixel,pixel.alpha,&composite,composite.alpha,
         &composite);
       SetPixelViaPixelInfo(image,&composite,q);
-      x_offset++;
       q+=GetPixelChannels(image);
     }
     if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)

MagickCore/exception.c

@@ -208,9 +208,6 @@ MagickExport void CatchException(ExceptionInfo *exception)
   const ExceptionInfo
     *p;
 
-  ssize_t
-    i;
-
   assert(exception != (ExceptionInfo *) NULL);
   assert(exception->signature == MagickCoreSignature);
   if (exception->exceptions  == (void *) NULL)
@@ -219,7 +216,7 @@ MagickExport void CatchException(ExceptionInfo *exception)
   exceptions=(LinkedListInfo *) exception->exceptions;
   ResetLinkedListIterator(exceptions);
   p=(const ExceptionInfo *) GetNextValueInLinkedList(exceptions);
-  for (i=0; p != (const ExceptionInfo *) NULL; i++)
+  while (p != (const ExceptionInfo *) NULL)
   {
     if ((p->severity >= WarningException) && (p->severity < ErrorException))
       MagickWarning(p->severity,p->reason,p->description);