audacity: fix gcc6 build

srcpkgs/audacity/patches/fix-return_null.patch

@@ -0,0 +1,20 @@
+--- src/import/ImportFLAC.cpp	2016-01-08 23:05:48.000000000 +0100
++++ src/import/ImportFLAC.cpp	2016-10-14 22:19:44.434290227 +0200
+@@ -296,7 +296,7 @@
+    int cnt;
+    wxFile binaryFile;
+    if (!binaryFile.Open(filename)) {
+-      return false; // File not found
++      return NULL; // File not found
+    }
+ 
+ #ifdef USE_LIBID3TAG
+@@ -313,7 +313,7 @@
+ 
+    if (cnt == wxInvalidOffset || strncmp(buf, FLAC_HEADER, 4) != 0) {
+       // File is not a FLAC file
+-      return false;
++      return NULL;
+    }
+ 
+    // Open the file for import

srcpkgs/audacity/template

@@ -1,7 +1,7 @@
 # Template file for 'audacity'
 pkgname=audacity
 version=2.1.2
-revision=1
+revision=2
 wrksrc="${pkgname}-Audacity-${version}"
 build_style=gnu-configure
 configure_args="--with-libsamplerate"