fixed errors reported by scan-build

dependencies/physfs/archivers/zip.c

@@ -1028,7 +1028,7 @@ static int zip_parse_end_of_central_dir(void *in, ZIPinfo *info,
 {
     PHYSFS_uint32 ui32;
     PHYSFS_uint16 ui16;
-    PHYSFS_sint64 len;
+    PHYSFS_sint64 len = 0;
     PHYSFS_sint64 pos;
 
     /* find the end-of-central-dir record, and seek to it. */

dependencies/physfs/lzma/C/Archive/7z/7zIn.c

@@ -1123,7 +1123,7 @@ SZ_RESULT SzReadAndDecodePackedStreams2(
 {
 
   UInt32 numUnPackStreams = 0;
-  CFileSize dataStartPos;
+  CFileSize dataStartPos = 0;
   CFolder *folder;
   #ifndef _LZMA_IN_CB
   CFileSize packSize = 0;

dependencies/physfs/platform/unix.c

@@ -171,17 +171,19 @@ static char *findBinaryInPath(const char *bin, char *envr)
             exe = x;
         } /* if */
 
-        /* build full binary path... */
-        strcpy(exe, start);
-        if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
-            strcat(exe, "/");
-        strcat(exe, bin);
-
-        if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
-        {
-            strcpy(exe, start);  /* i'm lazy. piss off. */
-            return(exe);
-        } /* if */
+		if(exe) {
+		    /* build full binary path... */
+			strcpy(exe, start);
+			if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
+				strcat(exe, "/");
+			strcat(exe, bin);
+
+			if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
+			{
+				strcpy(exe, start);  /* i'm lazy. piss off. */
+				return(exe);
+			} /* if */
+		}
 
         start = ptr + 1;  /* start points to beginning of next element. */
     } while (ptr != NULL);

dependencies/physfs/zlib123/deflate.c

@@ -350,6 +350,7 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
         INSERT_STRING(s, n, hash_head);
     }
     if (hash_head) hash_head = 0;  /* to make compiler happy */
+	(void) hash_head;
     return Z_OK;
 }