Fixed an engine crash, and an uninitalized value error

Ethereal would crash upon recieving a position command, if its length exceeded 2048 characters. I felt confident that no position would go that long, but I was wrong. The limit is now 8192 characters, which is ~2000 moves. I would be shocked to see a game go that long before adjudicating
Sometimes the LPV would not be filled during IID, causing bad values to be used as the table move. I could not find a case where fixing the issue changed the node counts, but it resolves the valgrind complaints none the less

src/search.c

@@ -389,7 +389,7 @@ int alphaBetaSearch(PVariation * pv, Board * board, int alpha, int beta,
             value = alphaBetaSearch(&lpv, board, -MATE, beta, depth-2, height, PVNODE);
 
         // Get the best move from the PV
-        tableMove = lpv.line[0];
+        if (lpv.length >= 1) tableMove = lpv.line[0];
 
         // Update tableIsTactical for LMR
         tableIsTactical = moveIsTactical(board, tableMove);

src/uci.c

@@ -48,7 +48,7 @@ int main(){
     Undo undo[1];
     SearchInfo info;
     uint16_t moves[MAX_MOVES];
-    char str[2048], moveStr[6], testStr[6], * ptr;
+    char str[8192], moveStr[6], testStr[6], * ptr;
 
     // Initalze all components of the chess engine
     initalizeMagics();
@@ -82,7 +82,7 @@ int main(){
            http://wbec-ridderkerk.nl/html/UCIProtocol.html */
 
         if (stringEquals(str, "uci")){
-            printf("id name Ethereal 8.20\n");
+            printf("id name Ethereal 8.21\n");
             printf("id author Andrew Grant\n");
             printf("option name Hash type spin default 16 min 1 max 2048\n");
             printf("uciok\n");
@@ -315,7 +315,7 @@ int stringContains(char * str, char * key){
 
 void getInput(char * str){
 
-    if (fgets(str, 2048, stdin) == NULL)
+    if (fgets(str, 8192, stdin) == NULL)
         exit(EXIT_FAILURE);
 
     char * ptr = strchr(str, '\n');