print_wrapped_text: fix output for negative indent

When providing a negative indent, it means that -indent columns were
already printed. Fix a bug where the function ate the first character
if already the first word did not fit into the first line.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

utf8.c

@@ -268,7 +268,7 @@ int print_wrapped_text(const char *text, int indent, int indent2, int width)
 			}
 			else {
 				putchar('\n');
-				text = bol = space + 1;
+				text = bol = space + isspace(*space);
 				space = NULL;
 				w = indent = indent2;
 			}