fdo#47035: Fix loading of jpeg files on Mac/PPC

jpeg_decompress_struct gets padded when compiling libjpeg, but the
jpeg filter in svtools assume non-padded size, resulting in a mismatch
that makes libjpeg refuse to do its work.

jpeg/makefile.mk

@@ -36,8 +36,8 @@ TARGET=jpeg
 
 .IF "$(SYSTEM_JPEG)" == "YES"
 all:
-    @echo "An already available installation of libjpeg should exist on your system."
+	@echo "An already available installation of libjpeg should exist on your system."
-    @echo "Therefore the version provided here does not need to be built in addition."
+	@echo "Therefore the version provided here does not need to be built in addition."
 .ENDIF
 
 # --- Files --------------------------------------------------------
@@ -47,6 +47,9 @@ TARFILE_NAME=jpeg-8c
 TARFILE_MD5=a2c10c04f396a9ce72894beb18b4e1f9
 
 PATCH_FILES=jpeg-8c.patch
+.IF "$(OS)$(CPU)"=="MACOSXP"
+PATCH_FILES+=struct_alignment.patch
+.ENDIF
 
 ADDITIONAL_FILES=makefile.mk jconfig.h	
 
@@ -55,7 +58,7 @@ ADDITIONAL_FILES=makefile.mk jconfig.h
 BUILD_DIR=$(CONFIGURE_DIR)
 BUILD_ACTION=dmake $(MFLAGS) $(CALLMACROS)
 
-OUT2INC=	jconfig.h	\
+OUT2INC=    jconfig.h	\
             jerror.h	\
             jmorecfg.h	\
             jpegint.h	\

jpeg/struct_alignment.patch

@@ -0,0 +1,18 @@
+without this patch, the jpeg_decompress_struct will be padded, this in turn
+results in a mismatch when the jpeg filter in svtools is built, where no
+padding is assumed. Only affects Mac/PPC apparenlty, see fdo#47035
+--- misc/jpeg-8c/jpeglib.h	2010-11-17 22:01:56.000000000 +0100
++++ misc/build/jpeg-8c/jpeglib.h	2012-05-19 03:38:44.000000000 +0200
+@@ -583,11 +583,11 @@
+   /* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */
+   UINT8 JFIF_major_version;	/* JFIF version number */
+   UINT8 JFIF_minor_version;
++  UINT8 Adobe_transform;	/* Color transform code from Adobe marker */
+   UINT8 density_unit;		/* JFIF code for pixel size units */
+   UINT16 X_density;		/* Horizontal pixel density */
+   UINT16 Y_density;		/* Vertical pixel density */
+   boolean saw_Adobe_marker;	/* TRUE iff an Adobe APP14 marker was found */
+-  UINT8 Adobe_transform;	/* Color transform code from Adobe marker */
+ 
+   boolean CCIR601_sampling;	/* TRUE=first samples are cosited */
+