ncurses 6.1 - patch 20180922

[ncurses.git] / ncurses / trace / varargs.c

diff --git a/ncurses/trace/varargs.c b/ncurses/trace/varargs.c
index 99e4f7659a7714dc6fb2f2a33d982991bc47c783..66252d88db210834c12a1fcc972592e3b0370472 100644 (file)
--- a/ncurses/trace/varargs.c
+++ b/ncurses/trace/varargs.c
@@ -34,7 +34,7 @@
 
 #include <ctype.h>
 
-MODULE_ID("$Id: varargs.c,v 1.10 2012/02/22 22:40:24 tom Exp $")
+MODULE_ID("$Id: varargs.c,v 1.11 2012/10/27 21:03:28 tom Exp $")
 
 #ifdef TRACE
 
@@ -170,9 +170,11 @@ _nc_varargs(const char *fmt, va_list ap)
                        }
                        MyLength += strlen(param) + 2;
                        MyBuffer = typeRealloc(char, MyLength, MyBuffer);
-                       _nc_SPRINTF(MyBuffer + strlen(MyBuffer),
-                                   _nc_SLIMIT(MyLength - strlen(MyBuffer))
-                                   ", %s", param);
+                       if (MyBuffer != 0) {
+                           _nc_SPRINTF(MyBuffer + strlen(MyBuffer),
+                                       _nc_SLIMIT(MyLength - strlen(MyBuffer))
+                                       ", %s", param);
+                       }
                    }
                }
                used = atUnknown;
@@ -182,7 +184,7 @@ _nc_varargs(const char *fmt, va_list ap)
        }
     }
 
-    return (MyBuffer);
+    return (MyBuffer ? MyBuffer : dummy);
 }
 #else
 EMPTY_MODULE(_nc_varargs)