Fix some individual cases of 'if (unsigned) < 0'

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@29320 f5534014-38df-0310-8fa8-9805f1628bb7

4 files changed, 10 insertions, 10 deletions

diff --git a/epan/dissectors/packet-gsm_a_dtap.c b/epan/dissectors/packet-gsm_a_dtap.c
index bbed499afd..98055b9a0e 100644
--- a/epan/dissectors/packet-gsm_a_dtap.c
+++ b/epan/dissectors/packet-gsm_a_dtap.c
@@ -3800,7 +3800,7 @@ dtap_mm_auth_req(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint len)
 	curr_offset++;
 	curr_len--;
 
-	if (curr_len <= 0) return;
+	if ((signed)curr_len <= 0) return;
 
 	ELEM_MAND_V(GSM_A_PDU_TYPE_DTAP, DE_AUTH_PARAM_RAND);
 
@@ -3910,7 +3910,7 @@ dtap_mm_cm_reestab_req(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint le
 	curr_offset++;
 	curr_len--;
 
-	if (curr_len <= 0) return;
+	if ((signed)curr_len <= 0) return;
 
 	ELEM_MAND_LV(GSM_A_PDU_TYPE_COMMON, DE_MS_CM_2, NULL);
 
@@ -4065,7 +4065,7 @@ dtap_mm_cm_srvc_req(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint len)
 	curr_offset++;
 	curr_len--;
 
-	if (curr_len <= 0) return;
+	if ((signed)curr_len <= 0) return;
 
 	ELEM_MAND_LV(GSM_A_PDU_TYPE_COMMON, DE_MS_CM_2, NULL);
 
@@ -4320,7 +4320,7 @@ dtap_mm_loc_upd_req(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint len)
 	curr_offset++;
 	curr_len--;
 
-	if (curr_len <= 0) return;
+	if ((signed)curr_len <= 0) return;
 
 	ELEM_MAND_V(GSM_A_PDU_TYPE_COMMON, DE_LAI);
 
@@ -4559,7 +4559,7 @@ dtap_cc_congestion_control(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guin
 	curr_offset++;
 	curr_len--;
 
-	if (curr_len <= 0) return;
+	if ((signed)curr_len <= 0) return;
 
 	ELEM_OPT_TLV(0x08, GSM_A_PDU_TYPE_DTAP, DE_CAUSE, NULL);
 
@@ -5839,7 +5839,7 @@ dissect_dtap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 
 	if (msg_str == NULL) return;
 
-	if ((len - offset) <= 0) return;
+	if (offset >= len) return;
 
 	/*
 	 * decode elements
diff --git a/epan/dissectors/packet-gsm_a_rp.c b/epan/dissectors/packet-gsm_a_rp.c
index 9432f486a4..208a2beba0 100644
--- a/epan/dissectors/packet-gsm_a_rp.c
+++ b/epan/dissectors/packet-gsm_a_rp.c
@@ -515,7 +515,7 @@ dissect_rp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 
 	if (str == NULL) return;
 
-	if ((len - offset) <= 0) return;
+	if (offset >=len) return;
 
 	/*
 	 * decode elements
diff --git a/epan/dissectors/packet-gsm_a_rr.c b/epan/dissectors/packet-gsm_a_rr.c
index ef2de9b48b..c0a0fd1fa4 100644
--- a/epan/dissectors/packet-gsm_a_rr.c
+++ b/epan/dissectors/packet-gsm_a_rr.c
@@ -7522,7 +7522,7 @@ dtap_rr_paging_resp(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint len)
     curr_offset++;
     curr_len--;
 
-    if (curr_len <= 0) return;
+    if ((signed)curr_len <= 0) return;
 
     ELEM_MAND_LV(GSM_A_PDU_TYPE_COMMON, DE_MS_CM_2, NULL);
 
@@ -8611,7 +8611,7 @@ dissect_ccch(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
     if (msg_str == NULL)
         return;
 
-    if ((len - offset) <= 0)
+    if (offset >= len)
         return;
 
     /*
diff --git a/epan/dissectors/packet-gsm_bssmap_le.c b/epan/dissectors/packet-gsm_bssmap_le.c
index 49c04581d7..ee0ab37d73 100644
--- a/epan/dissectors/packet-gsm_bssmap_le.c
+++ b/epan/dissectors/packet-gsm_bssmap_le.c
@@ -948,7 +948,7 @@ dissect_bssmap_le(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 
 	if (str == NULL) return;
 
-	if ((len - offset) <= 0) return;
+	if (offset >= len) return;
 
 	/*
 	 * decode elements