r.report: fix for https://trac.osgeo.org/grass/ticket/970

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@52817 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.report/header.c

@@ -72,10 +72,10 @@ int header(int unit1, int unit2)
 	divider("|");
 
 	label = nlayers > 1 ? "MAPS:" : "MAP:";
-	len1 = strlen(label) + 1;
 
 	mask = maskinfo();
 	label = "MASK:";
+	len1 = strlen(label) + 1;
 	while (mask) {
 	    fprintf(stdout, "|%-*s", len1, label);
 	    label = "";

raster/r.report/label.c

@@ -1,5 +1,7 @@
 #include <string.h>
 #include <stdio.h>
+#include <grass/gis.h>
+#include <grass/glocale.h>
 
 char *print_label(char *s, int len, int pflag, int spacing, int dot)
 {
@@ -7,6 +9,11 @@ char *print_label(char *s, int len, int pflag, int spacing, int dot)
     int n;
     int i;
 
+    if (len <= 0) {
+	G_warning(_("Page width is too small"));
+	return NULL;
+    }
+
     /* strip away leading spaces */
     while (*s == ' ')
 	s++;