Replace useless strncpy to avoid compilation warning

As suggested by Johannes Altmanninger.

Closes #1036

Author: koutcher

src/io.c

@@ -49,7 +49,7 @@ encoding_open(const char *fromcode)
 	}
 
 	encoding = calloc(1, sizeof(*encoding) + len);
-	strncpy(encoding->fromcode, fromcode, len);
+	strcpy(encoding->fromcode, fromcode);
 	encoding->cd = iconv_open(ENCODING_UTF8, fromcode);
 	if (encoding->cd == ICONV_NONE) {
 		free(encoding);

src/parse.c

@@ -262,7 +262,7 @@ get_path(const char *path)
 			free(entry);
 			return NULL;
 		}
-		strncpy(entry->path, path, strlen(path));
+		strcpy(entry->path, path);
 	}
 
 	return entry->path;

src/refs.c

@@ -207,7 +207,7 @@ refs_open(struct view *view, enum open_flags flags)
 		if (!ref)
 			return ERROR_OUT_OF_MEMORY;
 
-		strncpy(ref->name, name, name_length);
+		strcpy(ref->name, name);
 		refs_all = ref;
 	}
 

src/tree.c

@@ -129,7 +129,7 @@ tree_entry(struct view *view, enum line_type type, const char *path,
 	if (!line)
 		return NULL;
 
-	strncpy(entry->name, path, strlen(path));
+	strcpy(entry->name, path);
 	if (mode)
 		entry->mode = strtoul(mode, NULL, 8);
 	if (id)