4 x warning: suggest explicit braces to avoid ambiguous 'else'

Give compiler the extra braces it recommends.

DBio.c edited as my original change was caught out by the incorrect
indention of the 'else' keyword and my modification would have caused a
NULL deref.   Exactly the kind of issue this warning is trying to prevent.

CmdTZ.c:417:20: warning: suggest explicit braces to avoid ambiguous 'else'
DBio.c:1422:12: warning: suggest explicit braces to avoid ambiguous 'else'
DBpaint2.c:285:12: warning: suggest explicit braces to avoid ambiguous 'else'
DBpaint2.c:384:12: warning: suggest explicit braces to avoid ambiguous 'else'

GCC14 -Wall cleanup series [-Wdangling-else]

database/DBio.c

@@ -1420,9 +1420,10 @@ dbReadOpen(cellDef, setFileName, dereference, errptr)
 
 	pptr = strrchr(sptr, '.');
 	if (pptr != NULL)
+	{
 	    if (strcmp(pptr, DBSuffix)) pptr = NULL;
-	else
-	    *pptr = '\0';
+	    else *pptr = '\0';
+	}
 
 	/* If dereferencing, then use search paths first */
 	if (!dereference)

database/DBpaint2.c

@@ -283,6 +283,7 @@ DBPaintValid(cellDef, rect, mask, dinfo)
 
     for (t = TT_SELECTBASE; t < DBNumUserLayers; t++)
 	if (TTMaskHasType(&mmask, t))
+	{
 	    if (DBIsContact(t))
 	    {
 		tMask = DBResidueMask(t);
@@ -310,6 +311,7 @@ DBPaintValid(cellDef, rect, mask, dinfo)
 				(t << 14) : t) : t);
 		DBPaint(cellDef, rect, tloc);
 	    }
+	}
 }
 
 /*
@@ -382,6 +384,7 @@ DBEraseValid(cellDef, rect, mask, dinfo)
 
     for (t = TT_SELECTBASE; t < DBNumUserLayers; t++)
 	if (TTMaskHasType(&mmask, t))
+	{
 	    if (DBIsContact(t))
 	    {
 		tMask = DBResidueMask(t);
@@ -409,4 +412,5 @@ DBEraseValid(cellDef, rect, mask, dinfo)
 			 (t << 14) : t) : t);
 		DBErase(cellDef, rect, tloc);
 	    }
+	}
 }