Merge to XFA: Don't bother passing -1 as the length to the CFX_ByteString ctor.

core/src/fpdftext/fpdf_text.cpp

Index: core/src/fpdftext/fpdf_text.cpp
diff --git a/core/src/fpdftext/fpdf_text.cpp b/core/src/fpdftext/fpdf_text.cpp
index 0b53338ea0fdaa7f3bc43bb50f43190b5848a53b..2bd8b7d6cea18c855056fbef2679be7e25687a8b 100644
--- a/core/src/fpdftext/fpdf_text.cpp
+++ b/core/src/fpdftext/fpdf_text.cpp
@@ -22,10 +22,7 @@ CFX_ByteString CharFromUnicodeAlt(FX_WCHAR unicode,
       return CFX_ByteString((char)unicode);
     }
     const FX_CHAR* altstr = FCS_GetAltStr(unicode);
-    if (altstr) {
-      return CFX_ByteString(altstr, -1);
-    }
-    return CFX_ByteString(defchar, -1);
+    return CFX_ByteString(altstr ? altstr : defchar);
   }
   char buf[10];
   int iDef = 0;
@@ -35,10 +32,7 @@ CFX_ByteString CharFromUnicodeAlt(FX_WCHAR unicode,
     return CFX_ByteString(buf, ret);
   }
   const FX_CHAR* altstr = FCS_GetAltStr(unicode);
-  if (altstr) {
-    return CFX_ByteString(altstr, -1);
-  }
-  return CFX_ByteString(defchar, -1);
+  return CFX_ByteString(altstr ? altstr : defchar);
 }
 CTextPage::CTextPage() {}
 CTextPage::~CTextPage() {