libmad: unbreak build with gcc-4.3.x

libmad used the long deprecated -fforce-mem gcc flag, which no longer is
recognized in gcc-4.3.x. It has long been a noop, so simply remove it.

package/multimedia/libmad/libmad-0.15.1b-remove-deprecated-cflags.patch

@@ -0,0 +1,33 @@
+libmad: remove deprecated cflags (-fforce-mem)
+
+fforce-mem has long been deprecated, and is completely removed from
+gcc 4.3.x on.
+---
+ configure    |    1 -
+ configure.ac |    1 -
+ 2 files changed, 2 deletions(-)
+
+Index: libmad-0.15.1b/configure.ac
+===================================================================
+--- libmad-0.15.1b.orig/configure.ac
++++ libmad-0.15.1b/configure.ac
+@@ -140,7 +140,6 @@
+     case "$optimize" in
+ 	-O|"-O "*)
+ 	    optimize="-O"
+-	    optimize="$optimize -fforce-mem"
+ 	    optimize="$optimize -fforce-addr"
+ 	    : #x optimize="$optimize -finline-functions"
+ 	    : #- optimize="$optimize -fstrength-reduce"
+Index: libmad-0.15.1b/configure
+===================================================================
+--- libmad-0.15.1b.orig/configure
++++ libmad-0.15.1b/configure
+@@ -19099,7 +19099,6 @@
+     case "$optimize" in
+ 	-O|"-O "*)
+ 	    optimize="-O"
+-	    optimize="$optimize -fforce-mem"
+ 	    optimize="$optimize -fforce-addr"
+ 	    : #x optimize="$optimize -finline-functions"
+ 	    : #- optimize="$optimize -fstrength-reduce"