File gtkmathview-0.8.0-gcc6.patch of Package mingw64-gtkmathview

--- gtkmathview-0.8.0/configure.ac	2007-10-15 09:04:20.000000000 +0200
+++ gtkmathview-0.8.0/configure.ac	2016-05-26 23:35:51.307714867 +0200
@@ -406,8 +406,8 @@
 AC_SUBST(T1_LIBS)
 AC_SUBST(T1_LIBS_X)
 
-CFLAGS="$CFLAGS -W -Wall"
-CXXFLAGS="$CXXFLAGS -W -Wall"
+CFLAGS="$CFLAGS -W -Wall -Wno-narrowing"
+CXXFLAGS="$CXXFLAGS -W -Wall -Wno-narrowing"
 
 if test $enable_debug = yes; then
 	CFLAGS="$CFLAGS -O0"
--- gtkmathview-0.8.0/src/engine/common/View.cc	2007-08-17 12:02:39.000000000 +0200
+++ gtkmathview-0.8.0/src/engine/common/View.cc	2016-05-26 23:28:38.889416788 +0200
@@ -291,7 +291,7 @@
 	  }
     }
 
-  return false;
+  return NULL;
 }
 
 bool