audio/zynaddsubfx: Fix buffer overflows

- Leave room for termination NUL in sscanf buffer.
- Use float instead of float_t.  On FreeBSD/i386 they are not the same.

Discovered during an exp-run for bug 276478.

audio/zynaddsubfx/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	zynaddsubfx
 DISTVERSION=	3.0.6
-PORTREVISION=	2
+PORTREVISION=	3
 PORTEPOCH=	2
 CATEGORIES=	audio
 

audio/zynaddsubfx/files/patch-rtosc_src_cpp_savefile.cpp

@@ -0,0 +1,11 @@
+--- rtosc/src/cpp/savefile.cpp.orig	2021-12-31 15:58:28 UTC
++++ rtosc/src/cpp/savefile.cpp
+@@ -534,7 +534,7 @@ int load_from_file(const char* file_content,
+     n = 0;
+
+     sscanf(file_content,
+-           "%% %128s v%u.%u.%u%n ", appbuf, &vma, &vmi, &vre, &n);
++           "%% %127s v%u.%u.%u%n ", appbuf, &vma, &vmi, &vre, &n);
+     if(n <= 0 || strcmp(appbuf, appname) || vma > 255 || vmi > 255 || vre > 255)
+         return -bytes_read-1;
+

audio/zynaddsubfx/files/patch-src_Effects_Distorsion.cpp

@@ -0,0 +1,11 @@
+--- src/Effects/Distorsion.cpp.orig	2022-01-22 01:46:21 UTC
++++ src/Effects/Distorsion.cpp
+@@ -75,7 +75,7 @@ rtosc::Ports Distorsion::ports = {
+
+             for(int i=0; i<128; ++i)
+                 buffer[i] = 2*(i/128.0)-1;
+-            memcpy(orig, buffer, sizeof(float_t)*128);
++            memcpy(orig, buffer, sizeof(buffer));
+
+             waveShapeSmps(sizeof(buffer)/sizeof(buffer[0]), buffer,
+                     dd.Ptype + 1, dd.Pdrive, dd.Poffset, dd.Pfuncpar);

audio/zynaddsubfx/files/patch-src_Synth_ADnote.cpp

@@ -0,0 +1,11 @@
+--- src/Synth/ADnote.cpp.orig	2022-01-22 01:46:21 UTC
++++ src/Synth/ADnote.cpp
+@@ -1264,7 +1264,7 @@ inline void ADnote::ComputeVoiceOscillator_SincInterpo
+ inline void ADnote::ComputeVoiceOscillator_SincInterpolation(int nvoice)
+ {
+     // windowed sinc kernel factor Fs*0.3, rejection 80dB
+-    const float_t kernel[] = {
++    const float kernel[] = {
+         0.0010596256917418426f,
+         0.004273442181254887f,
+         0.0035466063043375785f,