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acid: don't get fooled by spaces in convflt()

--- a/sys/src/cmd/acid/exec.c

+++ b/sys/src/cmd/acid/exec.c

@@ -213,17 +213,24 @@

 void

 convflt(Node *r, char *flt)

 {

-	char c;

+	char *s;

-	c = flt[0];

-	if(('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z')) {

+	while(*flt == ' ')

+		flt++;

+

+	s = flt;

+	if(*s == '-' || *s == '+')

+		s++;

+	if(*s == '.')

+		s++;

+

+	if(*s >= '0' && *s <= '9'){	

+		r->type = TFLOAT;

+		r->fval = atof(flt);

+	} else {

 		r->type = TSTRING;

 		r->fmt = 's';

 		r->string = strnode(flt);

-	}

-	else {

-		r->type = TFLOAT;

-		r->fval = atof(flt);

 	}

 }