Convert codebase to use emalloc.c utility-functions

This also definitely increases readability and makes OOM-conditions
more consistent.

util/apathmax.c

@@ -18,7 +18,5 @@ apathmax(char **p, long *size)
 			eprintf("pathconf:");
 		}
 	}
-
-	if (!(*p = malloc(*size)))
-		eprintf("malloc:");
+	*p = emalloc(*size);
 }

util/getlines.c

@@ -16,14 +16,11 @@ getlines(FILE *fp, struct linebuf *b)
 	while ((len = agetline(&line, &size, fp)) != -1) {
 		if (++b->nlines > b->capacity) {
 			b->capacity += 512;
-			nline = realloc(b->lines, b->capacity * sizeof(*b->lines));
-			if (!nline)
-				eprintf("realloc:");
+			nline = erealloc(b->lines, b->capacity * sizeof(*b->lines));
 			b->lines = nline;
 		}
 		linelen = len + 1;
-		if (!(b->lines[b->nlines-1] = malloc(linelen)))
-			eprintf("malloc:");
+		b->lines[b->nlines-1] = emalloc(linelen);
 		memcpy(b->lines[b->nlines-1], line, linelen);
 	}
 	free(line);