gvpr: squash -Wconversion warning from 'read' return

This call is asked to read an `int` length of bytes, so cannot return more than
`INT_MAX`.

diff --git a/lib/gvpr/compile.c b/lib/gvpr/compile.c
index 24083bae46b1791d68eb32ffcb9fac6e3fcbe712..a7fe27bf51ef85acc73820b5e3707f7437e26bac 100644 (file)
--- a/lib/gvpr/compile.c
+++ b/lib/gvpr/compile.c
@@ -63,7 +63,7 @@ static Sflong_t ptr2int(const void *p) {
 
 static int iofread(void *chan, char *buf, int bufsize)
 {
-    return read(sffileno(chan), buf, bufsize);
+    return (int)read(sffileno(chan), buf, bufsize);
 }
 
 static int ioflush(void *chan)