fix a few man pages

buffer/buffer_fromsa.3

@@ -4,7 +4,7 @@ buffer_fromsa \- initialize buffer structure from stralloc
 .SH SYNTAX
 .B #include <buffer.h>
 
-int \fBbuffer_fromsa\fR(buffer* \fIb\fR,stralloc* \fIsa\fR);
+void \fBbuffer_fromsa\fR(buffer* \fIb\fR,stralloc* \fIsa\fR);
 .SH DESCRIPTION
 buffer_fromsa makes a virtual read buffer from a stralloc.  The buffer
 reading functions will be able to read until the end of the data in the

buffer/buffer_init.3

@@ -4,7 +4,7 @@ buffer_init \- initialize buffer structure
 .SH SYNTAX
 .B #include <buffer.h>
 
-int \fBbuffer_init\fR(buffer &\fIb\fR,
+void \fBbuffer_init\fR(buffer &\fIb\fR,
                 int (*\fIop\fR)(int,char*,unsigned int),
                 int \fIfd\fR, unsigned char* \fIy\fR, unsigned long int \fIylen\fR);
 .SH DESCRIPTION

buffer/buffer_init_free.3

@@ -4,7 +4,7 @@ buffer_init_free \- initialize buffer structure
 .SH SYNTAX
 .B #include <buffer.h>
 
-int \fBbuffer_init_free\fR(buffer &\fIb\fR,
+void \fBbuffer_init_free\fR(buffer &\fIb\fR,
                 int (*\fIop\fR)(int,char*,unsigned int),
                 int \fIfd\fR, unsigned char* \fIy\fR, unsigned long int \fIylen\fR);
 .SH DESCRIPTION

buffer/buffer_seek.3

@@ -4,7 +4,7 @@ buffer_seek \- remove bytes from beginning of string in buffer
 .SH SYNTAX
 .B #include <buffer.h>
 
-int \fBbuffer_seek\fP(buffer* \fIb\fR,unsigned long int \fIr\fR);
+void \fBbuffer_seek\fP(buffer* \fIb\fR,unsigned long int \fIr\fR);
 .SH DESCRIPTION
 buffer_seek removes \fIr\fR bytes from the beginning of the string.
 \fIr\fR must be at most the current length of the string.