Silence remaining -Wunused-variable warnings

src/fceu-memory.c

@@ -39,7 +39,6 @@ void *FCEU_gmalloc(uint32 size)
 
 void *FCEU_malloc(uint32 size)
 {
-   int retval = 0;
    void *ret;
    ret = (void*)malloc(size);
 

src/general.c

@@ -69,7 +69,6 @@ void FCEUI_SetDirOverride(int which, char *n)
 
 char *FCEU_MakeFName(int type, int id1, char *cd1)
 {
-   struct stat tmpstat;
    char tmp[2048] = {0};
    char *ret      = 0;