Put double-quotes around the install path in the "install-headers" section

of the makefiles for libavcodec, libavformat and libavutil.
Fixes installing into paths with spaces in them, i.e. Windows.
patch by Fredrik Orderud < fredrik . orderud -- at -- idi . ntnu . no >

Originally committed as revision 4680 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -494,8 +494,8 @@ install-headers:
 	mkdir -p "$(prefix)/include/ffmpeg"
 	install -m 644 $(SRC_PATH)/libavcodec/avcodec.h \
                 "$(prefix)/include/ffmpeg"
-	install -d $(libdir)/pkgconfig
-	install -m 644 ../libavcodec.pc $(libdir)/pkgconfig
+	install -d "$(libdir)/pkgconfig"
+	install -m 644 ../libavcodec.pc "$(libdir)/pkgconfig"
 
 #
 # include dependency files if they exist

libavformat/Makefile

@@ -130,8 +130,8 @@ install-headers:
                 $(SRC_PATH)/libavformat/rtp.h $(SRC_PATH)/libavformat/rtsp.h \
                 $(SRC_PATH)/libavformat/rtspcodes.h \
                 "$(prefix)/include/ffmpeg"
-	install -d $(libdir)/pkgconfig
-	install -m 644 ../libavformat.pc $(libdir)/pkgconfig
+	install -d "$(libdir)/pkgconfig"
+	install -m 644 ../libavformat.pc "$(libdir)/pkgconfig"
 
 %.o: %.c
 	$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $< 

libavutil/Makefile

@@ -84,8 +84,8 @@ install-headers:
 	               $(SRC_PATH)/libavutil/rational.h \
 	               $(SRC_PATH)/libavutil/intfloat_readwrite.h \
                 "$(prefix)/include/ffmpeg"
-	install -d $(libdir)/pkgconfig
-	install -m 644 ../libavutil.pc $(libdir)/pkgconfig
+	install -d "$(libdir)/pkgconfig"
+	install -m 644 ../libavutil.pc "$(libdir)/pkgconfig"
 
 #
 # include dependency files if they exist