PCRE 2 - fix compilation error

src/nnn.c

@@ -1876,6 +1876,7 @@ static char xchartohex(char c)
 
 static char * (*fnstrstr)(const char *haystack, const char *needle) = &strcasestr;
 #ifdef PCRE
+static const unsigned char *tables;
 static int pcreflags = PCRE_NO_AUTO_CAPTURE | PCRE_EXTENDED | PCRE_CASELESS;
 #else
 static int regflags = REG_NOSUB | REG_EXTENDED | REG_ICASE;