zint.1.pmd: fix guarddescent arg (may be float) (sigh).

docs/manual.txt

@@ -4252,10 +4252,10 @@ OPTIONS
     For Data Matrix in GS1 mode, use GS (0x1D) as the GS1 data separator instead
     of FNC1.
 
---guarddescent=INTEGER
+--guarddescent=NUMBER
 
-    For UPC/EAN symbols, set the height of the guard bars’ descent, where
-    INTEGER is in integral multiples of the X-dimension.
+    For UPC/EAN symbols, set the height of the guard bars’ descent, where NUMBER
+    is in multiples of the X-dimension. NUMBER may be floating-point.
 
 --height=NUMBER
 

docs/zint.1

@@ -223,9 +223,10 @@ The input data must not otherwise contain parentheses.
 For Data Matrix in GS1 mode, use \f[V]GS\f[R] (0x1D) as the GS1 data
 separator instead of \f[V]FNC1\f[R].
 .TP
-\f[V]--guarddescent=INTEGER\f[R]
+\f[V]--guarddescent=NUMBER\f[R]
 For UPC/EAN symbols, set the height of the guard bars\[cq] descent,
-where \f[I]INTEGER\f[R] is in integral multiples of the X-dimension.
+where \f[I]NUMBER\f[R] is in multiples of the X-dimension.
+\f[I]NUMBER\f[R] may be floating-point.
 .TP
 \f[V]--height=NUMBER\f[R]
 Set the height of the symbol in multiples of the X-dimension.

docs/zint.1.pmd

@@ -172,10 +172,10 @@ Paintbrush (`PCX`), Portable Network Format (`PNG`), Scalable Vector Graphic (`S
 
 :   For Data Matrix in GS1 mode, use `GS` (0x1D) as the GS1 data separator instead of `FNC1`.
 
-`--guarddescent=INTEGER`
+`--guarddescent=NUMBER`
 
-:   For UPC/EAN symbols, set the height of the guard bars' descent, where *INTEGER* is in integral multiples of the
-    X-dimension.
+:   For UPC/EAN symbols, set the height of the guard bars' descent, where *NUMBER* is in multiples of the X-dimension.
+	*NUMBER* may be floating-point.
 
 `--height=NUMBER`